Dr. Pavel Cheben Profile

Dr. Pavel Cheben

Principal Research Officer at National Research Council Canada

SPIE Involvement:

Conference Program Committee | Conference Chair | Editor | Author

Publications (134)

Proceedings Article | 13 March 2024 Presentation

Presentation

Silicon photonic Bragg grating structures for spectral filtering

Alejandro Ortega-Moñux, Alejandro Fernández-Hinestrosa, Carlos Pérez-Armenta, José Manuel Luque-González, Alejandro Sánchez-Postigo, Daniel Pereira-Martín, J. Gonzalo Wangüemert-Pérez, Robert Halir, Abdelfettah Hadij-El Houati, Pavel Cheben, Jens Schmid, Maziyar Milanizadeh, Shurui Wang, Kevan MacKay, Winnie Ye, Íñigo Molina-Fernández

Proceedings Volume PC12889, PC128890V (2024) https://doi.org/10.1117/12.3002513

KEYWORDS: Optical filters, Tunable filters, Bragg gratings, Silicon photonics, Telecommunications, Silicon, Quantum optics applications, Quantum optics, Optical gratings, Modulation

Read Abstract +

Proceedings Article | 13 March 2024 Presentation

Presentation

Advanced optical antenna and optical phased array designs

Jianhao Zhang, Shahrzad Khajavi, Daniele Melati, Winnie Ye, Pavel Cheben, Jens Schmid

Proceedings Volume PC12889, PC128890W (2024) https://doi.org/10.1117/12.3002742

KEYWORDS: Phased array optics, Optical antennas, Optical design, Silicon

Read Abstract +

Proceedings Article | 13 March 2024 Presentation

Presentation

Recent advances in integrated photonics with subwavelength and resonant metamaterials

Jens Schmid, Pavel Cheben, Jianhao Zhang, Maziyar Milanizadeh, Saad Bin-Alam, Dan-Xia Xu, Ross Cheriton, Martin Vachon, Shurui Wang, Rubin Ma, William Fraser, Shahrzad Khajavi, Winnie Ye, Pablo Ginel Moreno, Jose-Manuel Luque-González, Alejandro Fernández Hinestrosa, Alejandro Sanchez-Postigo, Robert Halir, Gonzalo Wanguemert-Perez, Alejandro Ortega-Monux, Inigo Molina-Fernández, Zindine Mokkedem, Daniele Melati, Carlos Alonso-Ramos, Laurent Vivien, Radovan Korcek, Daniel Benedikovic, Cameron Naraine, Jonathan Bradley, Yunus Sirmaci, Isabelle Staude

Proceedings Volume PC12889, PC128890M (2024) https://doi.org/10.1117/12.3000757

KEYWORDS: Quantum metamaterials, Photonic metamaterials, Integrated photonics, Quantum optics applications, Optical metamaterials, Industrial applications, Waveguides, Tunable filters, Silicon photonics, Quantum technology applications

Read Abstract +

Proceedings Article | 13 March 2024 Presentation

Presentation

Prospects and design considerations for hybrid glass-silicon waveguides

Jonathan Bradley, Bruno Segat Frare, Batoul Hashemi, Pooya Torab Ahmadi, Manuel Arturo Méndez-Rosales, Niloofar Majidian Taleghani, Cameron Naraine, Khadijeh Miarabbas Kiani, Henry Frankis, Dawson Bonneville, Jens Schmid, Pavel Cheben, Ponnambalam Ravi Selvaganapathy, Peter Mascher, Andrew Knights

Proceedings Volume PC12891, PC1289107 (2024) https://doi.org/10.1117/12.3011295

KEYWORDS: Waveguides, Design and modelling, Silicon photonics, Laser resonators, Silicon, Metrology, Glasses, Cladding

Read Abstract +

Proceedings Article | 12 March 2024 Presentation + Paper

Presentation + Paper

High-efficiency off-chip grating couplers for silicon nitride photonics

Radovan Korček, William Fraser, Quentin Wilmart, David Medina Quiroz, Jan Litvik, Lukáš Žúbor, Tomáš Krehel, Samson Edmond, Maziyar Milanizadeh, Jens Schmid, Pavel Cheben, Winnie Ye, Laurent Vivien, Carlos Alonso-Ramos, Daniel Benedikovic

Proceedings Volume 12889, 1288909 (2024) https://doi.org/10.1117/12.3002214

KEYWORDS: Optical gratings, Silicon, Silicon nitride, Optical surfaces, Optical fibers, Waveguides, Quantum photonics, Polarization gratings, Integrated photonics, Design

Read Abstract +

Proceedings Article | 12 March 2024 Presentation + Paper

Presentation + Paper

Design of subwavelength-engineered surface grating couplers on a hybrid α-Si/SiN photonic platform

William Fraser, Daniel Benedikovic, Radovan Korcek, Maziyar Milanizadeh, Jens Schmid, Pavel Cheben, Winnie Ye

Proceedings Volume 12889, 128890F (2024) https://doi.org/10.1117/12.3001539

KEYWORDS: Optical gratings, Silicon nitride, Design, Apodization, Waveguides, Optical fibers, Finite-difference time-domain method, Amorphous silicon, Photonic integrated circuits, Diffraction gratings

Read Abstract +

Proceedings Article | 12 March 2024 Presentation

Presentation

Experimental demonstration of a SiN integrated polarization beam splitter for the 950 nm wavelength band

Zindine Mokeddem, Laurent Vivien, Delphine Marris-Morini, Eric Cassan, Pavel Cheben, Jens Schmid, Dan-Xia Xu, Yuri Grinberg, Maziyar Milanizadeh, Carlos Ramos, Daniele Melati

Proceedings Volume PC12893, PC1289302 (2024) https://doi.org/10.1117/12.3002840

KEYWORDS: Polarization, Silicon nitride, Beam splitters, Quantum experiments, Polarization control, Photonic integrated circuits, Windows, Wave propagation, Transparency, Quantum technology applications

Read Abstract +

Proceedings Article | 9 March 2024 Presentation

Presentation

Advances in photonic metamaterials and sensing architectures

Robert Halir, Antonia Torres-Cubillo, Miguel Barona-Ruiz, Ana Sánchez-Ramírez, José Luque-González, Laureano Moreno-Pozas, Carlos Pérez-Armenta, Pablo Ginel-Moreno, Alejandro Fernández-Hinestrosa, Jonas Leuermann, Jose de-Oliva-Rubio, Jens Schmid, Alejandro Ortega-Moñux, Gonzalo Wangüemert-Pérez, Pavel Cheben, Íñigo Molina-Fernández

Proceedings Volume PC12890, PC1289002 (2024) https://doi.org/10.1117/12.3002700

KEYWORDS: Photonic metamaterials, Silicon photonics, Polarization, Optical metamaterials, Integrated optics, Silicon, Semiconductor lasers, Polarizers, Optical sensing, Laser sources

Read Abstract +

Proceedings Article | 9 March 2024 Presentation

Presentation

Engineering subwavelength-grating photonic integrated structures for quantum applications

Alejandro Sánchez-Postigo, Pablo Ginel-Moreno, Connor Graham-Scott, Jens Schmid, J. Gonzalo Wangüemert-Pérez, Alejandro Ortega-Moñux, Pavel Cheben, Íñigo Molina-Fernández, Carsten Schuck

Proceedings Volume PC12890, PC128900A (2024) https://doi.org/10.1117/12.3002731

KEYWORDS: Nanowires, Quantum applications, Engineering, Waveguides, Single photon detectors, Silicon, Quantum metamaterials, Quantum devices, Photonic metamaterials, Design and modelling

Read Abstract +

Proceedings Article | 8 March 2024 Presentation + Paper

Presentation + Paper

Si-rich silicon nitride for nonlinear signal processing applications

Frederic Gardes, Valerio Vitali, Thalía Domínguez Bucio, Hao Liu, José Manuel Luque González, Francisco Jurado-Romero, Alejandro Ortega-Moñux, Glenn Churchill, James Gates, James Hillier, Nikolaos Kalfagiannis, Daniele Melati, Ilaria Cristiani, Jens Schmid, Pavel Cheben, J. Gonzalo Wangüemert-Pérez, Íñigo Molina-Fernández, Cosimo Lacava, Periklis Petropoulos

Proceedings Volume 12890, 128900D (2024) https://doi.org/10.1117/12.3025186

KEYWORDS: Waveguides, Silicon nitride, Bragg wavelengths, Signal processing, Nonlinear optics, Silicon, Multiplexing, Four wave mixing, Signal attenuation, Scattering

Read Abstract +

Proceedings Article | 26 June 2023 Presentation + Paper

Presentation + Paper

All dielectric Mie-resonant waveguides and nanophotonic structures

Y. Denizhan Sırmacı, Angela Barreda Gomez, Thomas Pertsch, Jens Schmid, Pavel Cheben, Isabelle Staude

Proceedings Volume PC12575, PC125750C (2023) https://doi.org/10.1117/12.2667390

KEYWORDS: Waveguides, Nanoparticles, Scattering, Silicon, Magnetism, Transmittance, Integrated photonics, Nanophotonics, Silicon photonics, Silica

Read Abstract +

Proceedings Article | 31 May 2023 Presentation + Paper

Presentation + Paper

Robust single-etch surface grating couplers for silicon nitride waveguide platform

Radovan Korček, Pavel Cheben, Carlos Alonso-Ramos, Laurent Vivien, Daniel Benedikovič

Proceedings Volume 12575, 1257508 (2023) https://doi.org/10.1117/12.2666064

KEYWORDS: Optical gratings, Silicon nitride, Optical design, Waveguides, Optical fibers, Fabrication, Finite-difference time-domain method, Apodization, Silicon, Polarization gratings

Read Abstract +

Proceedings Article | 31 May 2023 Presentation + Paper

Presentation + Paper

Silicon-based surface gratings for efficient fiber-chip and free-space beam coupling

Daniel Benedikovic, William Fraser, Radovan Korcek, Xiaochen Xin, Yousef Karimi Yonjali, Carlos Alonso-Ramos, Laurent Vivien, Pavel Cheben, Jens Schmid, Maziyar Milanizadeh, Tom Smy, Ahmad Atieh, Winnie Ye

Proceedings Volume 12575, 1257507 (2023) https://doi.org/10.1117/12.2665440

KEYWORDS: Silicon nitride, Silicon, Optical gratings, Waveguides, Phased array optics, Silicon photonics, Photonic metamaterials, Optical antennas, Integrated photonics, Antennas

Read Abstract +

Silicon photonics has established itself as a key integration platform, leveraging high-quality materials and large-scale manufacturing using mastered toolsets of complementary metal-oxide-semiconductor (CMOS) foundries. Chip-scale photonics offer unique promises for dense integration of versatile optical functions through compact and high-performance building blocks. Integrated photonics is now competing technology for many applications, spanning from telecom/datacom and interconnects up to quantum sciences and light detection and ranging (LIDAR) systems, among others. However, the lack of low-loss input/output chip interfaces can be prohibitive to successfully deploy multi-diverse device applications. Low coupling loss is essential in reducing overall power budget in photonic systems, impacting on-chip integration level. The light coupling from an off-chip environment into the planar waveguide platforms has always been a challenging research problem since the early years of integrated photonics. Optical interfaces formed on a photonic chip surface, rather than implemented on a chip edge, have been widely used to access photonic circuits with optical fibers or enabling free-space coupling of light beams. Surface gratings can be positioned at arbitrary locations and/or arranged in pre-defined patterns on the chip, facilitating wafer-scale testing and optical packaging. In this work, we present our recent progress in the development of silicon-based surface gratings for use in fiber-to-chip and free-space beam coupling. In particular, we discuss prospective design approaches to develop low-loss surface grating couplers implemented on silicon-on-insulator (SOI), silicon nitride (SiN), and hybrid silicon-silicon nitride (Si-SiN) platforms, allowing to approach a coupling loss below -1 dB. Among these, we also cover contemporary advances in compact silicon metamaterial nano-antennas for dense optical phased arrays, obtaining high a diffraction performance (> 90%) and wideband operation (> 200 nm) simultaneously.

Proceedings Article | 31 May 2023 Presentation

Presentation

Subwavelength control of light and sound in silicon

Jianhao Zhang, Paula Nuño Ruano, Thi Thuy Duong Dinh, David González-Andrade, David Medina Quiroz, Daniel Benedikovic, Pavel Cheben, David Bouville, Daniel Lanzillotti Kimura, Delphine Marris-Morini, Eric Cassan, Laurent Vivien, Carlos Alonso-Ramos

Proceedings Volume PC12575, PC1257509 (2023) https://doi.org/10.1117/12.2665992

KEYWORDS: Silicon, Waveguides, Silica, Mid-IR, Absorption, Transparency, Supercontinuum generation, Phonons, Nonlinear optics, Cladding

Read Abstract +

Proceedings Article | 31 May 2023 Presentation

Presentation

Recent progress in subwavelength grating metamaterial engineered silicon photonic devices

Juan Gonzalo Wangüemert-Pérez, Carlos Pérez-Armenta, Pablo Ginel-Moreno, José Manuel Luque-González, Abdelfettah Hadij-El Houati, Alejandro Sánchez-Postigo, José de Oliva Rubio, Alejandro Ortega-Moñux, Robert Halir, Jens Schmid, Pavel Cheben, Íñigo Molina-Fernández

Proceedings Volume PC12575, PC125750A (2023) https://doi.org/10.1117/12.2666094

KEYWORDS: Metamaterials, Silicon photonics, Waveguides, Polarization, Lithography, Collimation, Silicon, Refractive index, Phased arrays, Optical filters

Read Abstract +

Proceedings Article | 31 May 2023 Presentation

Presentation

Hybrid integration of monolithic microresonators

Gualtiero Nunzi Conti, Daniele Farnesi, Stefano Pelli, Silvia Soria, Simone Berneschi, Francesco Baldini, Pavel Cheben, Carlos Alonso-Ramos

Proceedings Volume PC12575, PC125750B (2023) https://doi.org/10.1117/12.2665652

KEYWORDS: Microresonators, Waveguides, Silicon photonics, Resonators, Silicon, Photonic crystals, Silica, Photonic integrated circuits, Metamaterials

Read Abstract +

Proceedings Article | 17 March 2023 Presentation + Paper

Presentation + Paper

Silicon photonic mode multiplexers based on subwavelength metamaterials and on-chip beamforming

D. González-Andrade, R. Fernández de Cabo, J. Vilas, T. T. Dinh, J. Luque-González, D. Oser, G. Aubin, F. Amar, D. Pérez-Galacho, I. Olivares, A. Dias, R. Halir, A. Ortega-Moñux, J. Wangüemert-Pérez, Í. Molina-Fernández, E. Cassan, D. Marris-Morini, P. Cheben, L. Vivien, A. Velasco, C. Alonso-Ramos

Proceedings Volume 12425, 1242506 (2023) https://doi.org/10.1117/12.2649751

KEYWORDS: Crosstalk, Silicon photonics, Design and modelling, Data communications, Waveguides, Metamaterials, Phase shifting, Space division multiplexing

Read Abstract +

Proceedings Article | 17 March 2023 Presentation

Presentation

Bricked and evanescently-coupled topologies: expanding the portfolio of subwavelength metamaterial silicon photonic devices

Juan Gonzalo Wangüemert-Pérez, Carlos Pérez-Armenta, Pablo Ginel-Moreno, José Manuel Luque-González, Abdelfettah Hadij-El Houati, Alejandro Sánchez Postigo, Jose de Oliva Rubio, Alejandro Ortega-Moñux, Robert Halir, Jens Schmid, Pavel Cheben, Íñigo Molina-Fernández

Proceedings Volume PC12424, PC1242405 (2023) https://doi.org/10.1117/12.2651817

KEYWORDS: Metamaterials, Waveguides, Silicon photonics, Silicon, Polarization, Photonic integrated circuits, Waveguide sensors, Wave propagation, Structural design, Silica

Read Abstract +

Proceedings Article | 17 March 2023 Presentation

Presentation

Subwavelength metamaterial devices with optimization and machine learning

Daniele Melati, Zindine Mokeddem, Paula Nuño-Ruano, Eric Cassan, Delphine Marris-Morini, Laurent Vivien, Carlos Alonso-Ramos, Yuri Grinberg, Muhammad Al-Digeil, Dan-Xia Xu, Maziyar Milanizadeh, Jianhao Zhang, Jens Schmid, Pavel Cheben, Shahrzad Khajavi, Winnie Ye, Abi Waqas, Paolo Manfredi

Proceedings Volume PC12425, PC1242509 (2023) https://doi.org/10.1117/12.2649953

KEYWORDS: Metamaterials, Machine learning, Control systems, Waveguides, Tolerancing, Silicon photonics, Silicon, Photonics systems, Photonics, Photonic devices

Read Abstract +

Proceedings Article | 17 March 2023 Presentation

Presentation

Subwavelength silicon nanostructuration for nonlinear and optomechanic applications

Thi Thuy Duong Dinh, Jianhao Zhang, Paula Nuño-Ruano, David González Andrade, Xavier Le Roux, Miguel Montesinos Ballester, Christian Lafforgue, David Medina Quiroz, Daniel Benedikovic, Pavel Cheben, David Bouville, Norberto Daniel Lanzillotti Kimura, Delphine Marris-Morini, Eric Cassan, Laurent Vivien, Carlos Alonso Ramos

Proceedings Volume PC12425, PC1242505 (2023) https://doi.org/10.1117/12.2650205

KEYWORDS: Silicon, Optomechanical design, Waveguides, Silica, Mid-IR, Absorption, Transparency, Supercontinuum generation, Phonons, Nonlinear optics

Read Abstract +

Proceedings Article | 17 March 2023 Presentation

Presentation

Integrated silicon photonic optical phased arrays with large beam steering and high resolution

Winnie Ye, Daniel Benedikovic, Qiankun Liu, Shahrzad Khajavi, Daniele Melati, Pavel Cheben, Tom Smy, Ahmad Atieh, Alejandro Sánchez Postigo, Jens Schmid, Dan-Xia Xu, Xiaochen Xin

Proceedings Volume PC12425, PC124250G (2023) https://doi.org/10.1117/12.2650465

KEYWORDS: Beam steering, Phased array optics, Silicon photonics, LIDAR, Silicon, Optical components, Chemical elements, Unmanned vehicles, Solid state physics, Satellite communications

Read Abstract +

Proceedings Article | 17 March 2023 Presentation

Presentation

Controlling light with advanced subwavelength grating metamaterial topologies

José Manuel Luque-González, Robert Halir, Alejandro Sánchez-Postigo, J. Gonzalo Wangüemert-Pérez, Pavel Cheben, Jens H. Schmid, Aitor V. Velasco, Íñigo Molina-Fernández, Alejandro Ortega-Moñux

Proceedings Volume PC12425, PC124250A (2023) https://doi.org/10.1117/12.2651447

KEYWORDS: Metamaterials, Silicon photonics, Polarization, Anisotropy, Waveguides, Refractive index, Photonic devices, Optical testing, Optical properties, Optical metamaterials

Read Abstract +

Proceedings Article | 17 March 2023 Presentation

Presentation

Combining bulk resonators and integrated silicon photonics based on metamaterial engineering

Daniele Farnesi, Stefano Pelli, Silvia Soria, Gualtiero Nonzi Conti, Xavier Le Roux, Miguel Montesinos Ballester, Laurent Vivien, Pavel Cheben, Carlos Alonso Ramos

Proceedings Volume PC12407, PC1240704 (2023) https://doi.org/10.1117/12.2654637

KEYWORDS: Resonators, Silicon photonics, Metamaterials, Optical fibers, Waveguides, Silicon, Silica, Signal generators, Reliability, Photonics

Read Abstract +

Proceedings Article | 3 October 2022 Presentation

Presentation

Experimental characterization of a high-performance Y-junction enhanced with subwavelength grating metamaterials (Conference Presentation)

Raquel Fernández de Cabo, Jaime Vilas Ramos, Pavel Cheben, Aitor Villafranca Velasco, David González Andrade

Proceedings Volume PC12195, PC121951J (2022) https://doi.org/10.1117/12.2631762

KEYWORDS: Metamaterials, Tolerancing, Lithography, Silicon photonics, Optical lithography, Integrated optics, Integrated circuits, Assembly tolerances

Read Abstract +

Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

On-sky demonstration of astrophotonic fiber Fabry-Pérot correlation spectroscopy

Ross Cheriton, Erin Tonita, Volodymyr Artyshchuk, Adam Densmore, Suresh Sivanandam, Ernst de Mooij, Pavel Cheben, Dan-Xia Xu, Jens H. Schmid, Karin Hinzer, Siegfried Janz

Proceedings Volume 12188, 121885F (2022) https://doi.org/10.1117/12.2619244

KEYWORDS: Carbon dioxide, Absorption, Modulation, Optical filters, Tunable filters, Telescopes, Absorption filters, Exoplanets, Astrophotonics, Sun

Read Abstract +

Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Design and testing of an on-sky astrophotonic telescope platform for on-chip instrumentation

Erin M. Tonita, Volodymyr Artyshchuk, John Weber, Siegfried Janz, Adam Densmore, Suresh Sivanandam, Ernst de Mooij, Jens H. Schmid, Pavel Cheben, DanXia Xu, Karin Hinzer, Ross Cheriton

Proceedings Volume 12188, 121882Z (2022) https://doi.org/10.1117/12.2622465

KEYWORDS: Telescopes, Astrophotonics, Absorption, Domes, Optical instrument design, Spectroscopes, Resonators, Remote sensing, Astronomy, Carbon dioxide

Read Abstract +

Proceedings Article | 5 March 2022 Presentation + Paper

Presentation + Paper

Subwavelength-engineered metamaterial devices for integrated photonics

A. Sánchez Postigo, P. Ginel-Moreno, D. Pereira-Martin, A. Hadij-El Houati, J. M. Luque-González, C. Pérez-Armenta, J. G. Wangüemert-Pérez, A. Ortega-Moñux, R. Halir, J. H. Schmid, J. Soler Penadés, M. Nedeljkovic, W. Ye, G. Mashanovich, P. Cheben, I. Molina-Fernández

Proceedings Volume 12005, 120050A (2022) https://doi.org/10.1117/12.2607147

KEYWORDS: Waveguides, Silicon, Metamaterials, Optical antennas, Optical filters, Wave propagation, Polarization, Demultiplexers, Mid-IR, Bragg gratings, Optical filter design

Read Abstract +

Proceedings Article | 5 March 2022 Presentation

Presentation

Iterative and efficient Bloch mode calculations for integrated photonics applications

Mohsen Kamandar Dezfouli, Daniele Melati, Yuri Grinberg, Muhammad Al-Digeil, Ross Cheriton, Pavel Cheben, Jens Schmid, Siegfried Janz, Dan-Xia Xu

Proceedings Volume PC12004, PC120040F (2022) https://doi.org/10.1117/12.2610477

KEYWORDS: Integrated photonics, Geometrical optics, Signal processing, Reliability, Photonics, Optimization (mathematics), Optical properties, Nanophotonics, Iterative methods, Analytical research

Read Abstract +

Proceedings Article | 5 March 2022 Presentation

Presentation

Fiber Fabry-Pérot filter correlation spectroscopy for real-time radial velocity determination and astrophotonic gas sensing

Ross Cheriton, Erin Tonita, Volodymyr Artyshchuk, Adam Densmore, Suresh Sivanandam, Ernst de Mooij, Dan-Xia Xu, Jens Schmid, Pavel Cheben, Siegfried Janz

Proceedings Volume PC12008, PC1200809 (2022) https://doi.org/10.1117/12.2610397

KEYWORDS: Optical filters, Spectroscopy, Image filtering, Absorption, Exoplanets, Atmospheric sensing, Carbon dioxide, Absorption filters, Venus, Tunable filters

Read Abstract +

Proceedings Article | 5 March 2022 Presentation + Paper

Presentation + Paper

Uniting micro-optics and integrated optics: a case study on bulk resonators

D. Farnesi, G. Frigenti, S. Pelli, S. Soria, S. Berneschi, F. Baldini, G. Testa, G. Persichetti, R. Bernini, P. Cheben, L. Vivien, X. Le Rouxe, C. Alonso-Ramos, G. Nunzi Conti

Proceedings Volume 12004, 120040G (2022) https://doi.org/10.1117/12.2610254

KEYWORDS: Waveguides, Resonators, Silica, Polymers, Optical fibers, Glasses, Coating, Microresonators, Silicon, Metamaterials

Read Abstract +

Proceedings Article | 5 March 2022 Presentation

Presentation

Dimensionality reduction and optimization for the inverse design of photonic integrated devices

Daniele Melati, Mohsen Kamandar Dezfouli, Yuri Grinberg, Muhammad Al-Digeil, Dan-Xia Xu, Jens Schmid, Pavel Cheben, Abi Waqas, Paolo Manfredi, Shahrzad Khajavi, Winnie Ye, Paula Nuño-Ruano, Jianhao Zhang, Eric Cassan, Delphine Marris-Morini, Laurent Vivien, Carlos Alonso-Ramos

Proceedings Volume PC12005, PC120050D (2022) https://doi.org/10.1117/12.2617543

KEYWORDS: Photonic devices, Metamaterials, Machine learning

Read Abstract +

Proceedings Article | 5 March 2022 Presentation + Paper

Presentation + Paper

UV-written silicon nitride integrated optical phased arrays

S. Ilie, G. De Paoli, A. Flint, T. Dominguez Bucio, P. Ginel-Moreno, J. Sagar, A. Ortega-Monux, K. Lekkas, T. Rutirawut, L. Mastronardi, I. Skandalos, I. Molina Fernandez, G. Kanellos, P. Cheben, P. G. R. Smith, J. Gates, F. Gardes

Proceedings Volume 12005, 1200504 (2022) https://doi.org/10.1117/12.2608824

KEYWORDS: Antennas, Waveguides, Silicon, Refractive index, Ultraviolet radiation, Optical design, Chemical elements, Lithography, Deep ultraviolet, Telecommunications

Read Abstract +

Proceedings Article | 9 October 2021 Presentation + Paper

Presentation + Paper

Dimensionality reduction in designing advanced silicon photonic components

Yuri Grinberg, Muhammad Al-Digeil, Daniele Melati, Mohsen Kamandar Dezfouli, Jens Schmid, Pavel Cheben, Siegfried Janz, Dan-Xia Xu

Proceedings Volume 11903, 119030H (2021) https://doi.org/10.1117/12.2603513

KEYWORDS: Principal component analysis, Optical design, Neural networks, Silicon photonics, Machine learning, Visualization, Optical simulations, Nanophotonics

Read Abstract +

Proceedings Article | 18 April 2021 Presentation

Presentation

Efficient dual-band grating coupler for 10 Gbit passive optical networks fabricated by 193-nm deep-ultraviolet lithography

David González-Andrade, Diego Pérez-Galacho, Miguel Montesinos-Ballester, Xavier Le Roux, Eric Cassan, Delphine Marris-Morini, Pavel Cheben, Nathalie Vulliet, Stephane Monfray, Frédéric Boeuf, Laurent Vivien, Aitor Villafranca Velasco, Carlos Alonso-Ramos

Proceedings Volume 11775, 117750H (2021) https://doi.org/10.1117/12.2589704

KEYWORDS: Passive optical networks, Lithography, Deep ultraviolet, Waveguides, Silicon, Wave propagation, Single mode fibers, Reflectivity, Photonic devices, Oxides

Read Abstract +

Proceedings Article | 18 April 2021 Presentation

Presentation

Y-junction beamsplitter engineered through subwavelength metamaterials

Raquel Fernández de Cabo, David González Andrade, Pavel Cheben, Aitor Villafranca Velasco

Proceedings Volume 11775, 117750I (2021) https://doi.org/10.1117/12.2589705

KEYWORDS: Metamaterials, Beam splitters, Electroluminescence, Silicon photonics, Silicon, Finite-difference time-domain method, Waveguides, Silica, Semiconducting wafers, Reactive ion etching

Read Abstract +

Proceedings Article | 18 April 2021 Presentation

Presentation

Subwavelength metamaterials: the path towards next-generation silicon photonic devices.

Robert Halir, Jose Manuel Luque-González, Alejandro Sánchez-Postigo, Carlos Pérez-Armenta, Pablo Ginel-Moreno, Abdelfettah Hadij-ElHouati, Daniel Pereira-Martin, Antonia Torres-Cubillo, Jonas Leuermann, Jose de-Oliva-Rubio, Juan Gonzalo Wangüemert-Pérez, Alejandro Ortega-Moñux, Íñigo Molina-Fernández, Jens Schmid, Pavel Cheben, Jiri Ctyroky, Aitor Villafranca Velasco, Alaine Herrero-Bermello, David González-Andrade, Antonio Dias-Ponte, Milos Nedeljkovic, Goran Mashanovich

Proceedings Volume 11775, 1177509 (2021) https://doi.org/10.1117/12.2589054

KEYWORDS: Silicon photonics, Metamaterials, Waveguides, Telecommunications, Structured optical fibers, Refractive index, Polarization, Optical properties, Optical communications, Fiber couplers

Read Abstract +

Proceedings Article | 5 March 2021 Presentation + Paper

Presentation + Paper

Design of fully apodized and perfectly vertical surface grating couplers using machine learning optimization

Mohsen Kamandar Dezfouli, Yuri Grinberg, Daniele Melati, Jens Schmid, Pavel Cheben, Siegfried Janz, Dan-Xia Xu

Proceedings Volume 11689, 116890J (2021) https://doi.org/10.1117/12.2576945

KEYWORDS: Optical design, Machine learning, Waveguides, Diffraction gratings, Silicon, Optical fibers, Integrated optics, Reflection, Packaging, Interfaces

Read Abstract +

Proceedings Article | 5 March 2021 Presentation + Paper

Presentation + Paper

Subwavelength-grating metamaterial integrated devices for the near- and mid-infrared wavelengths

Alejandro Sánchez-Postigo, J. Gonzalo Wangüemert-Pérez, Alejandro Ortega-Moñux, Robert Halir, Daniel Pereira-Martín, José Manuel Luque-González, Jens Schmid, Shurui Wang, Martin Vachon, Dan-Xia Xu, Jordi Soler Penadés, Milos Nedeljkovic, Goran Mashanovich, Pavel Cheben, Íñigo Molina-Fernández

Proceedings Volume 11689, 1168913 (2021) https://doi.org/10.1117/12.2577577

KEYWORDS: Metamaterials, Mid-IR, Silicon photonics, Waveguides, Silicon, Nanophotonics, Integrated photonics, Germanium, Transparency

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Presentation

Machine-learning dimensionality reduction for multi-objective design of photonic devices

Daniele Melati, Mohsen Kamandar Dezfouli, Yuri Grinberg, Muhammad Al-Digeil, Siegfried Janz, Ross Cheriton, Jens Schmid, Pavel Cheben, Dan-Xia Xu

Proceedings Volume 11689, 116890H (2021) https://doi.org/10.1117/12.2586717

KEYWORDS: Photonic devices, Machine learning, Metamaterials, Tolerancing, Structural design, Modeling

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Presentation

Subwavelength grating silicon photonic devices

Iñigo Molina-Fernández, Abdelfettah Hadij-Elhouati, José Manuel Luque-González, Daniel Pereira, Alejandro Sánchez Postigo, Gonzalo Wangüenmert-Perez, Alejandro Ortega-Moñux, Robert Halir, Jose de Oliva Rubio, Jens Schmid, Pavel Cheben, Jiri Čtyroký

Proceedings Volume 11691, 1169109 (2021) https://doi.org/10.1117/12.2577455

KEYWORDS: Waveguides, Metamaterials, Silicon photonics, Optical filters, Silicon, Telecommunications, System integration, Structural design, Silica

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Presentation

Tunable index silicon nitride for CMOS photonics applications

Frederic Gardes, Thalía Domínguez Bucio, Lorenzo Mastronardi, Greta De Paoli, Senta Jantzen, Ilias Skandalos, Milan Milosevic, Valerio Vitali, Joaquin Faneca, Periklis Petropoulos, Francisco Jurado Romero, José Manuel Luque-González, Iñigo Molina-Fernández, Robert Halir, Alejandro Ortega-Moñux, J. G. Wangüemert-Pérez, Daniele Melati, Jens Schmid, Pavel Cheben

Proceedings Volume 11689, 1168916 (2021) https://doi.org/10.1117/12.2578387

KEYWORDS: Silicon, Refractive index, Photonics, Waveguides, Absorption, Wave propagation, Ultraviolet radiation, Tolerancing, Scattering, Polarization

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Presentation

Welcome and Introduction to SPIE Conference 11689

Sonia García-Blanco, Pavel Cheben

Proceedings Volume 11689, 1168903 (2021) https://doi.org/10.1117/12.2592150

Read Abstract +

Proceedings Article | 4 October 2020 Presentation

Presentation

Suspended silicon waveguide devices for mid-infrared sensing

Milos Nedeljkovic, Yangbo Wu, Alejandro Sanchez Postigo, Jordi Soler Penadés, Zhibo Qu, Alejandro Alejandro Ortega Moñux, Gonzalo Wangüemert Pérez, Robert Halir, Ali Khokhar, Ahmed Osman, Callum Littlejohns, Pavel Cheben, Iñigo Molina Fernández, Otto Muskens, Goran Mashanovich

Proceedings Volume 11577, 1157708 (2020) https://doi.org/10.1117/12.2584905

Read Abstract +

Proceedings Article | 2 April 2020 Presentation + Paper

Presentation + Paper

Design of multi-parameter photonic devices using machine learning pattern recognition

Daniele Melati, Yuri Grinberg, Mohsen Kamandar Dezfouli, Jens Schmid, Pavel Cheben, Siegfried Janz, Ross Cheriton, Alejandro Sánchez-Postigo, James Pond, Jens Niegemann, Adam Reid, Dan-Xia Xu

Proceedings Volume 11364, 1136408 (2020) https://doi.org/10.1117/12.2559583

KEYWORDS: Silicon photonics, Photonic devices, Pattern recognition, Machine learning, Optimization (mathematics), Principal component analysis, Waveguides, Integrated photonics, Finite-difference time-domain method

Read Abstract +

Enabled by technological improvements, photonic devices and circuits are becoming increasingly more complex. Non-trivial geometries are designed to reduce device footprint, improve performance, and introduce novel functionalities. However, the number of design variables required to properly represent these geometries quickly grows, limiting the effectiveness of classical design approaches. Moreover, parameters are often strongly interdependent, restricting the use of sequential optimizations or independent parameter sweeps. Although several optimization techniques can be effective for multi-parameter design, they commonly allow to optimize for a single or a handful designs and the optimization process needs to be repeated if new performance criteria are introduced. In contrast to classical design approaches, the in uences of the design parameters remain hidden as well as the general behavior of the design space. In this paper we present an extension of our recent work on the application of machine learning pattern recognition to the design of multi-parameter photonic devices. In particular, we propose using a combination of local optimization based on the adjoint method and the use of dimensionality reduction. Adjoint optimization is used multiple times to generate a small set of different designs with high performance. Dimensionality reduction is applied to analyze the relationship between these degenerate designs and identify a lower-dimensional design sub-space that includes all alternative good designs. This sub-space can be mapped for any performance criteria thus enabling informed decisions based on the relative priorities of all relevant performance specifications. As a proof of concept, we demonstrate a ten-parameter design of an integrated photonic power splitter using silicon-on-insulator technology. We identify a region of possible high performance design solutions and select two design candidates either maximizing the splitter efficiency or minimizing back-reflection.

Proceedings Article | 2 April 2020 Presentation

Presentation

Ultra-wideband flat anomalous dispersion in nanostructured silicon membrane waveguides (Conference Presentation)

Thi Thuy Duong Dinh, Jianhao Zhang, Miguel Montesinos, Xavier Le Roux, Christian Lafforgue, Daniel Benedikovic, Pavel Cheben, Eric Cassan, Delphine Marris-Morini, Gregory Maisons, Mathieu Carras, Sebastien Cremer, Stephane Monfray, Frederic Boeuf, Laurent Vivien, Carlos Alonso-Ramos

Proceedings Volume 11364, 113641E (2020) https://doi.org/10.1117/12.2555819

Read Abstract +

Proceedings Article | 9 March 2020 Presentation

Presentation

Smart on-chip Fourier-transform spectrometers harnessing machine learning algorithms (Conference Presentation)

Alaine Herrero-Bermello, Jiangfeng Li, Mohammad Khazaei, Yuri Grinberg, Aitor Velasco, Martin Vachon, Pavel Cheben, Lina Stankovic, Vladimir Stankovic, Dan-Xia Xu, Jens Schmid, Carlos Alonso-Ramos

Proceedings Volume 11284, 112841W (2020) https://doi.org/10.1117/12.2546253

KEYWORDS: Spectrometers, Machine learning, Absorption, Silicon photonics, Temperature metrology, Silicon, Detection and tracking algorithms, Spectroscopy, Medicine, Environmental sensing

Read Abstract +

Proceedings Article | 9 March 2020 Presentation

Presentation

Waveguide Bragg gratings for photonic noise suppression in silicon photon-pair sources (Conference Presentation)

Dorian Oser, Xavier Le Roux, Florent Mazeas, Diego Pérez-Galacho, Daniel Benedikovic, Elena Durán-Valdeiglesias, Vladyslav Vakarin, Olivier Alibart, Pavel Cheben, Sebastien Tanzilli, Laurent Labonté, Delphine Marris-Morini, Eric Cassan, Laurent Vivien, Carlos Alonso-Ramos

Proceedings Volume 11285, 1128517 (2020) https://doi.org/10.1117/12.2543019

KEYWORDS: Silicon, Silicon photonics, Waveguides, Bragg gratings, Optical filters, Quantum information, Four wave mixing, Microrings, Resonators, Cladding

Read Abstract +

Proceedings Article | 26 February 2020 Paper

Paper

Silicon chip-integrated fiber couplers with sub-decibel loss

Daniel Benedikovic, Carlos Alonso-Ramos, Sylvain Guerber, Cecilia Dupre, Bertrand Szelag, Xavier Le Roux, Pavel Cheben, Daivid Fowler, Guillaume Marcaud, Vladyslav Vakarin, Diego Perez-Galacho, Delphine Marris-Morini, Eric Cassan, Charles Baudot, Frederic Boeuf, Laurent Vivien

Proceedings Volume 11284, 112840L (2020) https://doi.org/10.1117/12.2543489

KEYWORDS: Silicon, Fiber couplers, Waveguides, Optical design, Nanophotonics, Diffraction gratings, Metamaterials, Lithography, Interfaces, Deep ultraviolet

Read Abstract +

Proceedings Article | 26 February 2020 Paper

Paper

Silicon subwavelength waveguiding devices

I. Molina-Fernández, J. G. Wangüemert-Pérez, A. Ortega-Moñux, Robert Halir, J. de Oliva Rubio, A. Sánchez-Postigo, J. M. Luque-González, Abdelfettah Hadij-Elhouati, D. Pereira-Martín, D. González-Andrade, A. V. Velasco, A. Herrero-Bermello, Jens Schmid, Pavel Cheben, J. Čtyroký

Proceedings Volume 11290, 112901L (2020) https://doi.org/10.1117/12.2545455

KEYWORDS: Waveguides, Silicon, Diffraction gratings, Optical filters, Optical design, Phase shifts, Light wave propagation, Radio propagation, Diffraction, Bragg gratings

Read Abstract +

Proceedings Article | 26 February 2020 Open Access

Open Access

Paper

Subwavelength grating metamaterial structures for integrated photonics

I. Molina-Fernández, J. G. Wangüemert-Perez, A. Ortega-Moñux, Robert Halir, J. de Oliva Rubio, A. Sánchez-Postigo, J. M. Luque-González, Abdelfettah Hadij-Elhouati, D. Pereira-Martín, D. González-Andrade, A. V. Velasco, A. Herrero-Bermello, Jens Schmid, Pavel Cheben, J. Čtyroký

Proceedings Volume 11284, 112840K (2020) https://doi.org/10.1117/12.2545061

KEYWORDS: Polarization, Metamaterials, GRIN lenses, Refractive index, Waveguides, Silicon, Anisotropy, Integrated photonics, Light wave propagation, Lens design

Read Abstract +

Proceedings Article | 12 September 2019 Presentation

Presentation

Ultra-compact remote CO2 detection with silicon waveguide ring resonators (Conference Presentation)

Ross Cheriton, Suresh Sivanandam, Adam Densmore, Daniele Melati, Mohsen Kamandar Dezfouli, Danxia Xu, Jens Schmidt, Jean Lapointe, Luc Simard, Pavel Cheben, Siegfried Janz

Proceedings Volume 11129, 111290K (2019) https://doi.org/10.1117/12.2529367

Read Abstract +

Proceedings Article | 26 April 2019 Paper

Paper

Enhanced performance of integrated silicon nanophotonic devices engineered by sub-wavelength grating structures

Daniel Benedikovic, Mathias Berciano, Carlos Alberto Alonso-Ramos, Xavier Le Roux, Sylvain Guerber, Guillaume Marcaud, Vladyslav Vakarin, Diego Pérez-Galacho, Eric Cassan, Delphine Marris-Morini, Pavel Cheben, Frédéric Boeuf, Charles Baudot, Laurent Vivien

Proceedings Volume 11031, 1103104 (2019) https://doi.org/10.1117/12.2520780

KEYWORDS: Waveguides, Silicon, Nanophotonics, Dispersion, Metamaterials, Fiber couplers, Resonators, Microrings, Optical design, Diffraction gratings

Read Abstract +

Proceedings Article | 26 April 2019 Presentation + Paper

Presentation + Paper

Diffractive sidewall grating coupler: towards 2D free-space optics on chip

A. Hadij-ElHouati, P. Cheben, A. Ortega-Moñux, J. G. Wangüemert-Pérez, R. Halir, J. Schmid, Í. Molina-Fernández

Proceedings Volume 11031, 110310R (2019) https://doi.org/10.1117/12.2522471

KEYWORDS: Diffraction gratings, Silicon, Beam expanders, Silicon photonics, 3D modeling, Free space optics, Finite-difference time-domain method, Metamaterials, Phased array optics

Read Abstract +

Proceedings Article | 26 April 2019 Presentation + Paper

Presentation + Paper

Designing polarization management devices by tilting subwavelength grating

José Manuel Luque-González, Alaine Herrero-Bermello, Alejandro Ortega-Moñux, Íñigo Molina-Fernández, Aitor Velasco, Pavel Cheben, Jens Schmid, Shurui Wang, Robert Halir

Proceedings Volume 11031, 110310M (2019) https://doi.org/10.1117/12.2522050

KEYWORDS: Polarization, Metamaterials, Homogenization, Anisotropy, Beam splitters, Optical design

Read Abstract +

Proceedings Article | 26 April 2019 Open Access

Open Access

Paper

Navigating through complex photonic design space using machine learning methods

Dan-Xia Xu, Yuri Grinberg, Daniele Melati, Moshen Kamandar Desfouli, Pavel Cheben, Jens Schmid, Siegfried Janz

Proceedings Volume 11031, 110310S (2019) https://doi.org/10.1117/12.2524909

KEYWORDS: Machine learning, Nanophotonics, Optimization (mathematics), Artificial neural networks, Principal component analysis, Metamaterials, Genetic algorithms, Integrated photonics, Silicon photonics, Pattern recognition

Read Abstract +

Proceedings Article | 4 March 2019 Presentation + Paper

Presentation + Paper

Temperature-insensitive echelle wavelength demultiplexer on standard silicon-on-insulator platform

Daniele Melati, Pierre Verly, André Delâge, Pavel Cheben, Jens Schmid, Siegfried Janz, Dan-Xia Xu

Proceedings Volume 10923, 109230Q (2019) https://doi.org/10.1117/12.2508633

KEYWORDS: Waveguides, Optical design, Demultiplexers, Optical filters, Mach-Zehnder interferometers, Silicon photonics

Read Abstract +

Proceedings Article | 4 March 2019 Presentation

Presentation

High-performance silicon Bragg filters exploiting sub-wavelength and symmetry engineering (Conference Presentation)

Dorian Oser, Xavier Le Roux, Florent Mazeas, Diego Pérez-Galacho, Daniel Benedikovic, Elena Durán-Valdeiglesias, Vladyslav Vakarin, Olivier Alibart, Pavel Cheben, Sébastien Tanzilli, Laurent Labonte, Delphine Marris-Morini, Eric Cassan, Laurent Vivien, Carlos Alonso-Ramos

Proceedings Volume 10921, 109211F (2019) https://doi.org/10.1117/12.2508644

KEYWORDS: Silicon, Electronic filtering, Silicon photonics, Photonics, Linear filtering, Photonic integrated circuits

Read Abstract +

Proceedings Article | 4 March 2019 Paper

Paper

Ge-rich SiGe-based wideband polarization insensitive photonic platform for mid-infrared free-space communications

Vladyslav Vakarin, Joan Manel Ramírez, Jacopo Frigerio, Qiankun Liu, Andrea Ballabio, Xavier Le Roux, Carlos Alonso-Ramos, Giovanni Isella, Laurent Vivien, Pavel Cheben, Winnie Ye, Delphine Marris-Morini

Proceedings Volume 10923, 109230Y (2019) https://doi.org/10.1117/12.2508875

KEYWORDS: Polarization, Waveguides, Mid-IR, Birefringence, Silicon, Germanium

Read Abstract +

Proceedings Article | 4 March 2019 Presentation

Presentation

Subwavelength silicon photonic metamaterials for mode multiplexing and polarization control (Conference Presentation)

Aitor Velasco, David González-Andrade, Alaine Herrero-Bermello, Antonio Dias, J. G. Wangüemert-Pérez, Alejandro Ortega-Moñux, Íñigo Molina-Fernández, Robert Halir, José Manuel Luque-González, Pavel Cheben

Proceedings Volume 10922, 1092206 (2019) https://doi.org/10.1117/12.2506148

KEYWORDS: Silicon photonics, Metamaterials, Multiplexing, Polarization control, Brain-machine interfaces, Polarization, Anisotropy, Photonic metamaterials, Beam splitters, Fiber couplers

Read Abstract +

Proceedings Article | 4 March 2019 Presentation + Paper

Presentation + Paper

Performance robustness analysis in machine-assisted design of photonic devices

Daniele Melati, Yuri Grinberg, Abi Waqas, Paolo Manfredi, Mohsen Kamandar Dezfouli, Pavel Cheben, Jens Schmid, Siegfried Janz, Andrea Melloni, Dan-Xia Xu

Proceedings Volume 10922, 1092203 (2019) https://doi.org/10.1117/12.2508602

KEYWORDS: Monte Carlo methods, Stochastic processes, Photonic devices, Waveguides, Machine learning, Optimization (mathematics), Optical design

Read Abstract +

Proceedings Article | 4 March 2019 Presentation

Presentation

Subwavelength silicon photonics (Conference Presentation)

Pavel Cheben

Proceedings Volume 10922, 109221L (2019) https://doi.org/10.1117/12.2506428

KEYWORDS: Silicon photonics, Waveguides, Metamaterials, Integrated circuits, Silicon, Fiber couplers, Structured optical fibers, Optical properties, Integrated optics, Planar waveguides

Read Abstract +

Proceedings Article | 4 March 2019 Presentation

Presentation

Engineering sub-wavelength silicon waveguides for sensing applications in the near-infrared and mid-infrared band (Conference Presentation)

Juan Gonzalo Wangüemert-Pérez, Alejandro Sánchez-Postigo, Abdelfettah Hadij-ElHouati, Jonas Leuermann, Carlos Pérez-Armenta, Faysal El Mokhtari Mimun, Daniel Pereira-Martín, José Manuel Luque-González, Alejandro Ortega-Moñux, Robert Halir, Iñigo Molina-Fernández, Pavel Cheben, Jens Schmid, Dan-Xia Xu, Jirí Čtyroký, Jordi Soler-Penades, Milos Nedeljkovic, Goran Mashanovich

Proceedings Volume 10923, 1092307 (2019) https://doi.org/10.1117/12.2508749

KEYWORDS: Waveguides, Silicon, Mid-IR, Light-matter interactions, Silicon photonics, Lab on a chip, Diffraction gratings, Silica, Metamaterials, Cladding

Read Abstract +

Proceedings Article | 4 March 2019 Paper

Paper

Reaping the benefits of machine learning pattern recognition in nanophotonic component design

Yuri Grinberg, Daniele Melati, Mohsen Kamandar Dezfouli, Siegfried Janz, Jens Schmid, Pavel Cheben, Alejandro Sánchez-Postigo, J. Gonzalo Wangüemert-Pérez, Iñigo Molina-Fernández, Alejandro Ortega-Moñux, Dan-Xia Xu

Proceedings Volume 10921, 109210B (2019) https://doi.org/10.1117/12.2506787

KEYWORDS: Machine learning, Optical design, Silicon, Nanophotonics, Pattern recognition, Principal component analysis, Metamaterials, Device simulation, Optimization (mathematics)

Read Abstract +

Proceedings Article | 23 May 2018 Presentation

Presentation

High rejection ratio silicon membrane Bragg filters (Conference Presentation)

Carlos Alonso-Ramos, Xavier Le Roux, Daniel Benedikovic, Vladyslav Vakarin, Elena Durán-Valdeiglesias, Dorian Oser, Diego Pérez-Galacho, Florent Mazeas, Sébastien Tanzilli, Laurent Labonte, Eric Cassan, Delphine Marris-Morini, Pavel Cheben, Laurent Vivien

Proceedings Volume 10671, 106711Z (2018) https://doi.org/10.1117/12.2307362

KEYWORDS: Silicon, Waveguides, Bragg gratings, Optical filters, Cladding, Silicon photonics, CMOS technology, Data communications, Transceivers, Photonic devices

Read Abstract +

Silicon photonics is considered an enabling technology for next generation datacom applications, providing ultra-compact and high-bandwidth transceivers that are cost-effectively fabricated at the existing CMOS facilities. Among photonic devices developed in silicon, Bragg gratings are routinely used for the realization of key functionalities including wavelength filtering, dispersion engineering and sensing. However, the realization of Bragg filters that simultaneously provides narrowband operation and high rejection remains a challenge in the Si platform. Indeed, the small core size of Si wires, together with the high index contrast between the silicon and the oxide cladding results in a strong interaction of the optical mode with the Bragg structure. Several approaches have been proposed to implement narrowband Bragg filters in Si wires including ultra-small corrugations (a few nanometres), periodic claddings, sub-wavelength engineering or inter-mode coupling. Nevertheless, these filters typically have comparatively weak light rejection performance due to fabrication errors limiting the accurate control of the grating geometry over few millimeter-long waveguide structures. In this work, we present a novel waveguide Bragg grating geometry that leverages the large index contrast between Si and air in membrane waveguides to overcome these limitations, yielding both narrow bandwidth and high rejection ratio. We use a novel waveguide corrugation geometry that radiates out the higher order modes, allowing effective single-mode operation for micrometric fully etched membrane waveguides. The high mode confinement of these waveguides results in weak interaction with the sidewall corrugation, thus narrowband operation is achieved. On the other hand, the high rejection ratio is achieved by combining reflection and radiation effects within the Bragg resonance. Based on this concept, we designed and experimentally demonstrated notch filters in single-etch suspended Si waveguides with cross-sections as large as 0.5 µm (height) by 1.1 µm (width). We show a narrow bandwidth of 4 nm for a 500 nm wide corrugation, with a high rejection ratio exceeding 50 dB for a filter length of only 700 µm

Proceedings Article | 23 May 2018 Presentation

Presentation

High efficiency polarization beam splitter based on anisotropy-engineered MMI (Conference Presentation)

Alaine Herrero, José Manuel Luque González, Aitor Velasco, Alejandro Ortega Moñux, Pavel Cheben, Robert Halir

Proceedings Volume 10683, 1068310 (2018) https://doi.org/10.1117/12.2307263

KEYWORDS: Polarization, Brain-machine interfaces, Beam splitters, Waveguides, Silicon, Birefringence, Fabrication, Refractive index, Wave propagation, Waveguide modes

Read Abstract +

In recent years, silicon-on-insulator (SOI) technology has focused remarkable attention due to its high index contrast, which enables a high confinement of the propagating waveguide mode and a great integration density. However, the sub-micron waveguide dimensions imply a large difference between the transverse electric (TE) and the transverse magnetic (TM) modes, giving rise to a strong birefringence. The extremely wide range of applicability of this platform increases the interest in the enhancement of the current polarization beam splitters (PBS) performance. Different approaches such as Mach-Zehnder interferometry based PBSs [1], Bragg grating waveguides [2], directional couplers [3], photonic crystals [4], slotted [5] and plasmonic [6] waveguides or multimode interference couplers (MMI) [7] have been proposed with this purpose. Nevertheless, these schemes present different drawbacks like large footprints, experimental set-up limitations, limited bandwidths, efficiency restrictions, tight fabrication tolerances or complex fabrication techniques. In this work, the novel PBS proposed is a MMI based on sub-wavelength grating (SWG) technology. SWGs are periodic structures of alternating materials, most commonly silicon and silicon dioxide, with a pitch much smaller than the wavelength of the propagating light, hence suppressing diffractive effects. These widely used structures can be considered as a homogeneous medium with an equivalent refractive index which is the average between the indices of both materials. By adjusting their geometric parameters, particularly the duty cycle, the equivalent index can be engineered opening the way to enhanced ultra-compact devices. SWGs have recently been demonstrated to be especially interesting in MMI couplers providing ultra-broadband bandwidths and notably efficiencies [8]. Therefore, the present design not only benefits from the inherently low losses of MMI devices, but also from the index engineering of subwavelength structures. Furthermore, the high degree of inherent birefringence of these structures provides our MMI with an anisotropic character, which can be advantageously engineered by tilting the SWG structures in the multimode region. The SWG segments in the multimode region are tilted with respect to the optical axis of the device. Progressively-tilted input and output inverse tapers are also implemented, improving coupling efficiency and reducing losses. By selectively tuning the propagation constants of each polarization, large differences in their Talbot self-imaging length can be implemented. As a result, the beat length for the TE and TM polarizations are highly disparate, enabling a compact polarization splitter configuration. With this technique, a more efficient device is obtained with a reduced footprint, low insertion losses and extinction ratios, and broad bandwidth. The polarization splitter implemented on SOI platform allows a one-step and simple fabrication process.

Proceedings Article | 23 May 2018 Presentation

Presentation

Subwavelength engineered ultrabroadband mode multiplexer (Conference Presentation)

David González-Andrade, Juan Gonzalo Wangüemert-Pérez, Aitor Velasco, Alejandro Ortega-Moñux, Alaine Herrero-Bermello, Robert Halir, Pavel Cheben

Proceedings Volume 10683, 106830Y (2018) https://doi.org/10.1117/12.2306012

KEYWORDS: Multiplexers, Waveguides, Multiplexing, Picosecond phenomena, Wavelength division multiplexing, Brain-machine interfaces, Phase shifts, Silicon photonics, Copper, Polarization

Read Abstract +

Silicon photonics interconnects have emerged as a promising way to exceed the capacity limits imposed by copper interconnects, exploiting different multiplexing technologies like wavelength division multiplexing (WDM) and polarization division multiplexing (PDM). However, the bandwidth demand is still growing and new multiplexing technologies like Mode division multiplexing (MDM) are required to overcome these limitations, enabling the transmission and reception of multiple modes through a single multi-mode waveguide. Several architectures have been proposed to perform mode multiplexing like asymmetrical directional couplers and architectures based on conventional MMIs, which show a narrowband performance. Recently, adiabatic and counter-tapered couplers have been presented showing a broader bandwidth, but both architectures suffer from large footprints. For this reason, a compact mode multiplexer with low insertion losses and low crosstalk over a broad bandwidth is still sought after. In this work, we present an ultra-broadband two-mode division (de)multiplexer (DE/MUX) that overcomes the restrictions imposed by conventional MMIs by means of sub-wavelength grating waveguides (SWG). SWG structures are composed by a disposition of different alternating materials that are repeated periodically with a pitch smaller than the operation wavelength enabling dispersion engineering. The structure of our broadband mode multiplexer is composed by a sub-wavelength engineered MMI, a 90º phase shifter (PS) and a symmetric Y-junction supporting the first two modes (TE0 and TE1) at the stem. By properly choosing the duty cycle (DC) and the pitch (Λ) of the SWG section of the sub-wavelength engineered MMI, an almost flat beat length can be achieved and, subsequently, a broader operation bandwidth. SWG tapers are included in order to perform an adiabatic transition between the non-periodic waveguides and the periodic structures of the SWG-MMI. On the other hand, the PS consists of two parallel waveguides, where the upper arm comprises two tapers in back-to-back configuration, whereas the lower arm is a straight waveguide. The operation principle of the device working as a MUX is as follows: the TE0 mode injected through the lower (upper) port of the SWG-MMI is equally split with the same amplitude and a phase difference of -90º between the two output ports. The PS generates a +90º phase shift between the upper and lower arms. Therefore, the modes arrives in-phase (out-of-phase) at the Y-junction, producing the output TE0 (TE1) mode. Silicon on Insulator (SOI) platform was considered for the design of the proposed two-mode DE/MUX with 220-nm-thick and 500-nm-wide waveguides surrounded by SiO2 substrate and cover. Full-3D-simulations of the device working as DEMUX show that insertion loss are less than 0.84 dB (0.61 dB) for the TE0 (TE1) mode in the [1.4 - 1.7] μm wavelength range, and less than 0.49 dB within [1.5 – 1.6] μm. The crosstalk of the two modes is below -20.29 dB in the [1.4 - 1.7] μm wavelength range and decreases down to -27.41 dB within [1.5 – 1.6] μm. In conclusion, we have proposed a SWG based ultra-broadband two-mode DE/MUX with a 300 nm bandwidth and a footprint as small as 36 x 3.7 μm.

Proceedings Article | 21 May 2018 Presentation + Paper

Presentation + Paper

Low-loss grating-coupled optical interfaces for large-volume fabrication with deep-ultraviolet optical lithography

Daniel Benedikovic, Carlos Alberto Alonso-Ramos, Sylvain Guerber, Diego Pérez-Galacho, Vladyslav Vakarin, Guillaume Marcaud, Xavier Le Roux, Eric Cassan, Delphine Marris-Morini, Pavel Cheben, Frédéric Boeuf, Charles Baudot, Laurent Vivien

Proceedings Volume 10686, 106860T (2018) https://doi.org/10.1117/12.2306258

KEYWORDS: Fiber couplers, Diffraction gratings, Silicon, Optical design, Deep ultraviolet, Reflectivity, Optical lithography, Interfaces, Waveguides, Etching

Read Abstract +

Proceedings Article | 17 May 2018 Paper

Paper

Spectral retrieval techniques for high-resolution Fourier-transform micro-spectrometers

Alaine Herrero-Bermello, Aitor Velasco, Hugh Podmore, Pavel Cheben, Jens Schmid, Siegfried Janz, María Calvo, Dan-Xia Xu, Alan Scott, Regina Lee

Proceedings Volume 10683, 1068319 (2018) https://doi.org/10.1117/12.2306130

KEYWORDS: Waveguides, Calibration, Fourier transforms, Silicon, Spectral resolution, Spectrometers, Interferometers, Transmittance, Heterodyning

Read Abstract +

Proceedings Article | 14 March 2018 Presentation

Presentation

High-directionality L-shaped fiber-chip grating couplers realized in 300-mm silicon-on-insulator platform with deep-ultraviolet lithography (Conference Presentation)

Carlos Alonso-Ramos, Daniel Benedikovich, Diego Pérez-Galacho, Sylvain Guerber, Vladyslav Vakarin, Guillaume Marcaud, Xavier Le Roux, Eric Cassan, Delphine Marris-Morini, Pavel Cheben, Frédéric Boeuf, Charles Baudot, Laurent Vivien

Proceedings Volume 10535, 105350W (2018) https://doi.org/10.1117/12.2290584

KEYWORDS: Diffraction gratings, Fiber couplers, Silicon, Deep ultraviolet, Lithography, Etching, Apodization, Diffraction, Mirrors, Semiconducting wafers

Read Abstract +

Proceedings Article | 14 March 2018 Presentation

Presentation

Silicon membrane Bragg filters for near- and mid-infrared applications (Conference Presentation)

Carlos Alonso-Ramos, Xavier Le Roux, Daniel Benedikovic, Vladyslav Vakarin, Elena Durán-Valdeiglesias, Dorian Oser, Diego Pérez-Galacho, Eric Cassan, Delphine Marris-Morini, Pavel Cheben, Laurent Vivien

Proceedings Volume 10535, 1053515 (2018) https://doi.org/10.1117/12.2291923

KEYWORDS: Silicon, Mid-IR, Waveguides, Transparency, Oxides, Light wave propagation, Nonlinear filtering, Data communications, Nonlinear optics, Quantum optics

Read Abstract +

Proceedings Article | 14 March 2018 Presentation

Presentation

Subwavelength grating metamaterial waveguides for silicon photonics (Conference Presentation)

Pavel Cheben

Proceedings Volume 10537, 1053708 (2018) https://doi.org/10.1117/12.2284336

KEYWORDS: Waveguides, Metamaterials, Silicon photonics, Structural engineering, Geometrical optics, Planar waveguides, Fiber couplers, Structured optical fibers, Multimode interference devices, Photonics

Read Abstract +

Proceedings Article | 16 June 2017 Presentation

Presentation

Design of optical metamaterial waveguide structures (Conference Presentation)

Alejandro Ortega-Moñux, Robert Halir, Alejandro Sánchez-Postigo, Jordi Soler-Penadés, Jirí Ctyroký, José Manuel Luque-González, José Darío Sarmiento-Merenguel, Juan Gonzalo Wangüemert-Pérez, Jens Schmid, Dan-Xia Xu, Sigfried Janz, Jean Lapointe, Iñigo Molina-Fernández, Milos Nedeljkovic, Goran Mashanovich, Pavel Cheben

Proceedings Volume 10242, 102420D (2017) https://doi.org/10.1117/12.2268861

KEYWORDS: Wave propagation, Radio propagation, Waveguides, Integrated optics, Mid-IR, Brain-machine interfaces, Diffraction gratings, Beam splitters, Optical design, Optical metamaterials

Read Abstract +

Proceedings Article | 16 June 2017 Presentation

Presentation

Possibilities of Bragg filtering structures based on subwavelength grating guiding mechanism (Conference Presentation)

Pavel Kwiecien, Ján Litvik, Ivan Richter, Jirí Ctyroký, Pavel Cheben

Proceedings Volume 10242, 102420F (2017) https://doi.org/10.1117/12.2266002

KEYWORDS: Photonics, Relays, Transformers, Waveguides, Optical filters, Silicon, Wave propagation, Numerical analysis, Refractive index, Light wave propagation

Read Abstract +

Silicon-on-insulator (SOI), as the most promising platform, for advanced photonic integrated structures, employs a high refractive index contrast between the silicon “core” and surrounding media. One of the recent new ideas within this field is based on the alternative formation of the subwavelength sized (quasi)periodic structures, manifesting as an effective medium with respect to propagating light. Such structures relay on Bloch wave propagation concept, in contrast to standard index guiding mechanism. Soon after the invention of such subwavelength grating (SWG) waveguides, the scientists concentrated on various functional elements such as couplers, crossings, mode transformers, convertors, MMI couplers, polarization converters, resonators, Bragg filters, and others. Our contribution is devoted to a detailed numerical analysis and design considerations of Bragg filtering structures based on SWG idea. Based on our previous studies where we have shown impossibility of application of various 2 and “2.5” dimensional methods for the proper numerical analysis, here we effectively use two independent but similar in-house approaches based on 3D Fourier modal methods, namely aperiodic rigorous coupled wave analysis (aRCWA) and bidirectional expansion and propagation method based on Fourier series (BEX) tools. As it was recently demonstrated, SWG Bragg filters are feasible. Based on this idea, we propose, simulate, and optimize spectral characteristics of such filters. In particular, we have investigated several possibilities of modifications of original SWG waveguides towards the Bragg filtering, including firstly - simple single-segment changes in position, thickness, and width, and secondly - several types of Si inclusions, in terms of perturbed width and thickness (and their combinations). The leading idea was to obtain required (e.g. sufficiently narrow) spectral characteristic while keeping the minimum size of Si features large enough. We have found that the second approach with the single element perturbations can provide promising designs. Furthermore, even more complex filtering SWG structures can be considered.

Proceedings Article | 16 June 2017 Presentation

Presentation

Silicon subwavelength structures for communications and sensing (Conference Presentation)

Robert Halir, Juan Manuel Luque-González, Gonzalo Wangüemert-Pérez, Alejandro Ortega-Moñux, Dan-Xia Xu, Jens Schmid, Pavel Cheben, Íñigo Molina-Fernández

Proceedings Volume 10249, 1024904 (2017) https://doi.org/10.1117/12.2267644

KEYWORDS: Anisotropy, Current controlled current source, Waveguides, Integrated photonics, Silicon, Fiber couplers, Structured optical fibers, Spectrometers, Refractive index, Electromagnetism

Read Abstract +

Proceedings Article | 16 June 2017 Presentation

Presentation

Mid- and near-infrared Si waveguides for sensing applications (Conference Presentation)

Carlos Alonso-Ramos, Xavier Le Roux, Daniel Benedikovic, Vladyslav Vakarin, Elena Durán-Valdeiglesias, Diego Pérez-Galacho, Eric Cassan, Delphine Marris-Morini, Pavel Cheben, Laurent Vivien

Proceedings Volume 10249, 102490A (2017) https://doi.org/10.1117/12.2267868

KEYWORDS: Silicon, Waveguides, Absorption, Oxides, Mid-IR, Integrated photonics, Transparency, Sensors, Current controlled current source

Read Abstract +

Proceedings Article | 17 May 2017 Presentation + Paper

Presentation + Paper

Broadband high-efficiency zero-order surface grating coupler for the near- and mid-infrared wavelength ranges

Alejandro Sánchez-Postigo, J. Gonzalo Wangüemert-Pérez, José Manuel Luque-González, Íñigo Molina-Fernández, Pavel Cheben, Carlos Alonso-Ramos, Robert Halir, Jens Schmid, Alejandro Ortega-Moñux

Proceedings Volume 10242, 102420E (2017) https://doi.org/10.1117/12.2265732

KEYWORDS: Waveguides, Mid-IR, Diffraction gratings, Cladding, Integrated optics, Optical fibers, Optical design, Silicon photonics, Single mode fibers, Dispersion, Silicon, Prisms, Germanium

Read Abstract +

Proceedings Article | 28 April 2017 Presentation

Presentation

Subwavelength Si photonics for near- and mid-infrared applications (Conference Presentation)

Carlos Alonso-Ramos, Diego Pérez-Galacho, Xavier Le Roux, Daniel Benedikovic, Florent Maezas, Weiwei Zhang, Samuel Serna, Vladyslav Vakarin, Elena Durán-Valdeiglesias, Nadia Belabas-Plougonven, Laurent Labonté, Sébastien Tanzilli, Pavel Cheben, Eric Cassan, Delphine Marris-Morini, Laurent Vivien

Proceedings Volume 10108, 1010815 (2017) https://doi.org/10.1117/12.2254811

KEYWORDS: Nanotechnology, Silicon, Mid-IR, Silicon photonics, Photonics, Waveguides, Optical lithography, Diffraction, Refractive index, Cladding

Read Abstract +

Proceedings Article | 20 February 2017 Paper

Paper

Subwavelength metamaterial engineering for silicon photonics

Robert Halir, Alejandro Ortega-Moñux, Jordi Soler-Penades, José Luque-González, Dario Sarmiento-Merenguel, Alejandro Sánchez-Postigo, Gonzalo Wangüemert-Pérez, Jens Schmid, Dan-Xia Xu, Siegfried Janz, Jean Lapointe, Íñigo Molina-Fernández, Milos Nedeljkovic, Goran Mashanovich, Pavel Cheben

Proceedings Volume 10107, 1010703 (2017) https://doi.org/10.1117/12.2253727

KEYWORDS: Anisotropy, Waveguides, Silicon photonics, Metamaterials, Structural engineering, Mid-IR, Dispersion, Beam splitters, Oxides, Photonic integrated circuits, Diffraction, Silicon, Refractive index, Brain-machine interfaces, Scanning electron microscopy

Read Abstract +

Proceedings Article | 27 July 2016 Presentation

Presentation

Silicon-on-insulator integrated tunable polarization controller (Conference Presentation)

Jose-Dario Sarmiento-Merenguel, Carlos Alonso-Ramos, Robert Halir, Xavier Le Roux, Laurent Vivien, Pavel Cheben, Elena Durán-Valdeiglesias, Iñigo Molina-Fernández, Delphine Marris-Morini, Danxia Xu, Jens Schmid, Siegfried Janz, Alejandro Ortega-Moñux

Proceedings Volume 9891, 989108 (2016) https://doi.org/10.1117/12.2229352

KEYWORDS: Polarization, Phase shifts, Silicon, Tolerancing, Silicon photonics, Integrated optics, Chemical elements, Integration, Photon polarization, Optical communications, Optical imaging, Quantum information

Read Abstract +

Proceedings Article | 3 March 2016 Paper

Paper

Silicon photonics: some remaining challenges

G. Reed, R. Topley, A. Khokhar, D. Thompson, S. Stanković, S. Reynolds, X. Chen, N. Soper, C. Mitchell, Y. Hu, L. Shen, G. Martinez-Jimenez, N. Healy, S. Mailis, A. Peacock, M. Nedeljkovic, F. Gardes, J. Soler Penades, C. Alonso-Ramos, A. Ortega-Monux, G. Wanguemert-Perez, I. Molina-Fernandez, P. Cheben, G. Mashanovich

Proceedings Volume 9751, 975102 (2016) https://doi.org/10.1117/12.2218124

KEYWORDS: Waveguides, Silicon photonics, Silicon, Annealing, Optical alignment, Signal attenuation, Semiconducting wafers, Multiplexers, Optical fibers, Transceivers

Read Abstract +

Proceedings Article | 13 February 2016 Paper

Paper

Silicon and germanium mid-infrared photonics

G. Mashanovich, G. Reed, M. Nedeljkovic, J. Soler Penades, C. Mitchell, A. Khokhar, C. Littlejohns, S. Stankovic, X. Chen, L. Shen, N. Healy, A. Peacock, C. Alonso-Ramos, A. Ortega-Monux, G. Wanguemert-Perez, I. Molina-Fernandez, P. Cheben, J. Ackert, A. Knights, F. Gardes, D. Thomson

Proceedings Volume 9755, 97550W (2016) https://doi.org/10.1117/12.2212834

KEYWORDS: Silicon, Waveguides, Germanium, Modulation, Absorption, Cladding, Mid-IR, Transparency, Photonics, Sensors

Read Abstract +

Proceedings Article | 1 May 2015 Paper

Paper

High-efficiency fully etched fiber-chip grating couplers with subwavelength structures for datacom and telecom applications

Daniel Benedikovic, Pavel Cheben, Jens Schmid, Dan-Xia Xu, Jean Lapointe, Shurui Wang, Siegfried Janz, Robert Halir, Alejandro Ortega-Moñux, Milan Dado

Proceedings Volume 9516, 95160I (2015) https://doi.org/10.1117/12.2177861

KEYWORDS: Fiber couplers, Diffraction gratings, Optical design, Silicon, Refractive index, Waveguides, Data communications, Deep ultraviolet, Silicon photonics, Optical fibers

Read Abstract +

Proceedings Article | 1 May 2015 Paper

Paper

Fiber-chip edge coupler with large mode size for silicon photonic wire waveguides

Martin Papes, Pavel Cheben, Winnie Ye, Jens Schmid, Dan-Xia Xu, Siegfried Janz, Daniel Benedikovic, Carlos Ramos, Robert Halir, Alejandro Ortega-Moñux, André Delâge, Vladimír Vašinek

Proceedings Volume 9516, 95160K (2015) https://doi.org/10.1117/12.2181547

KEYWORDS: Waveguides, Optical fibers, Silicon, Cladding, Silica, Fiber couplers, Refractive index, Silicon photonics, Polarization, Integrated optics

Read Abstract +

Proceedings Article | 1 May 2015 Paper

Paper

A subwavelength structured multimode interference coupler for the 3-4 micrometers mid-infrared band

Alejandro Sánchez-Postigo, Juan Gonzalo Wangüemert-Pérez, Robert Halir, Alejandro Ortega-Moñux, Carlos Alonso-Ramos, Íñigo Molina-Fernández, Jordi Soler Penadés, Milos Nedeljkovic, Goran Mashanovich, Pavel Cheben

Proceedings Volume 9516, 95160L (2015) https://doi.org/10.1117/12.2179454

KEYWORDS: Brain-machine interfaces, Waveguides, Silicon, Mid-IR, Multimode interference devices, Refractive index, Wave propagation, Molecules, Gases, Silica

Read Abstract +

Proceedings Article | 1 May 2015 Paper

Paper

High efficiency blazed fiber-chip grating coupler with interleaved trenches

C. Alonso-Ramos, D. Benedikovic, P, Cheben, S, Wang, R, Halir, J. Fédéli, A. Ortega-Moñux, J. Schmid, D. Xu, M. Dado, I. Molina-Fernández

Proceedings Volume 9516, 95160J (2015) https://doi.org/10.1117/12.2178620

KEYWORDS: Etching, Silicon, Silicon photonics, Electroluminescent displays, Fiber couplers, Oxides, Deep ultraviolet, Semiconducting wafers, Waveguides, Lithography

Read Abstract +

Proceedings Article | 27 February 2015 Paper

Paper

Group IV mid-infrared photonics

G. Mashanovich, M. Nedeljkovic, J. Soler Penades, C. Mitchell, A. Khokhar, C. Littlejohns, S. Stankovic, B. Troia, Y. Wang, S. Reynolds, V. M. Passaro, L. Shen, N. Healy, A. Peacock, C. Alonso-Ramos, A. Ortega-Monux, G. Wanguemert-Perez, I. Molina-Fernandez, D. Rowe, J. Wilkinson, P. Cheben, J. Ackert, A. Knights, D. Thomson, F. Gardes

Proceedings Volume 9367, 93670Q (2015) https://doi.org/10.1117/12.2176219

KEYWORDS: Waveguides, Silicon, Mid-IR, Germanium, Modulation, Photonics, Sensors, Resonators, Brain-machine interfaces, Photodetectors

Read Abstract +

Proceedings Article | 19 February 2014 Paper

Paper

Subwavelength metastructures for dispersion engineering in planar waveguide devices

Robert Halir, Alejandro Ortega-Moñux, Pavel Cheben, Alejandro Maese-Novo, Diego Pérez-Galacho, Carlos Alonso-Ramos, Íñigo Molina-Fernández, J. Wangüemert-Pérez, Jens Schmid, Dan-Xia Xu, Siegfried Janz

Proceedings Volume 8995, 89950U (2014) https://doi.org/10.1117/12.2045727

KEYWORDS: Brain-machine interfaces, Waveguides, Dispersion, Polarization, Silicon, Birefringence, Refractive index, Integrated optics, Fiber couplers, Planar waveguides

Read Abstract +

Proceedings Article | 22 May 2013 Paper

Paper

SWG dispersion engineering for ultra-broadband photonic devices

Robert Halir, Alejandro Maese-Novo, Sebastián Romero-García, Diego Pérez-Galacho, Luis Zavargo-Peche, Alejandro Ortega-Moñux, Íñigo Molina-Fernández, J. Gonzalo Wangüemert-Pérez, Pavel Cheben

Proceedings Volume 8767, 87670R (2013) https://doi.org/10.1117/12.2017229

KEYWORDS: Waveguides, Directional couplers, Dispersion, Brain-machine interfaces, Silicon, Refractive index, Light wave propagation, Photonic devices, Multimode interference devices, Diffraction

Read Abstract +

Proceedings Article | 21 May 2013 Paper

Paper

Analysis of couplers between photonic nanowires and subwavelength grating waveguides

Jirí Ctyroký, Pavel Kwiecien, Ivan Richter, Pavel Cheben

Proceedings Volume 8781, 87810B (2013) https://doi.org/10.1117/12.2017077

KEYWORDS: Waveguides, Silicon, Refractive index, Polarization, Wave propagation, Transmittance, 3D modeling, Silica, Nanowires, Photonic nanostructures

Read Abstract +

Proceedings Article | 7 May 2013 Paper

Paper

A general approach for robust integrated polarization rotators

C. Alonso-Ramos, R. Halir, Al. Ortega-Moñux, P. Cheben, L. Vivien, Iñ. Molina-Fernández, D. Marris-Morini, Si. Janz, D.-X. Xu, J. Schmid

Proceedings Volume 8781, 878109 (2013) https://doi.org/10.1117/12.2016845

KEYWORDS: Polarization, Waveguides, Phase shifts, Lawrencium, Waveguide modes, Tolerancing, Refractive index, Wave propagation, Thermal optics, Phase shifting

Read Abstract +

Proceedings Article | 24 October 2012 Paper

Paper

Temperature-independent silicon waveguides comprising bridged subwavelength gratings

M. Ibrahim, A. Aleali, J. Schmid, P. Cheben, J. Lapointe, S. Janz, P. Bock, A. Densmore, B. Lamontagne, R. Ma, D.-X. Xu, W. Ye

Proceedings Volume 8412, 84120Z (2012) https://doi.org/10.1117/12.2001480

KEYWORDS: Waveguides, Silicon, Bridges, Wave propagation, Polarization, Thermal optics, Refractive index, Photonics, Silicon photonics, Temperature metrology

Read Abstract +

Proceedings Article | 10 May 2012 Paper

Paper

Grating couplers in thick rib SOI waveguides for TE and TM polarizations

C. Alonso-Ramos, A. Ortega-Moñux, R. Halir, L. Zavargo-Peche, I. Molina-Fernández, P. Cheben, D.-X. Xu, S. Janz

Proceedings Volume 8431, 84310E (2012) https://doi.org/10.1117/12.922713

KEYWORDS: Waveguides, Polarization, Fiber couplers, Optical design, Optical fibers, Silicon, Etching, Diffraction gratings, Tolerancing, Wave propagation

Read Abstract +

Proceedings Article | 2 February 2012 Paper

Paper

Selecting the polarization in silicon photonic wire components

Dan-Xia Xu, André Delâge, Jens Schmid, Rubin Ma, Shurui Wang, Jean Lapointe, Martin Vachon, Pavel Cheben, Siegfried Janz

Proceedings Volume 8266, 82660G (2012) https://doi.org/10.1117/12.911368

KEYWORDS: Polarization, Waveguides, Silicon, Resonators, Silicon photonics, Birefringence, Directional couplers, Semiconducting wafers, Cladding, Lithography

Read Abstract +

Proceedings Article | 2 February 2012 Paper

Paper

New concepts in silicon component design using subwavelength structures

Iñigo Molina-Fernandez, Robert Halir, Alejandro Ortega-Moñux, Luis Zavargo-Peche, Sebastian Romero García, Alejandro Maese-Novo, Diego Perez-Galacho, Gonzalo Wanguemert-Perez, Pavel Cheben, Dan-Xia Xu

Proceedings Volume 8266, 82660E (2012) https://doi.org/10.1117/12.906785

KEYWORDS: Waveguides, Silicon, Polarization, Refractive index, Fiber couplers, Etching, Dispersion, Brain-machine interfaces, Optical design, Wave propagation

Read Abstract +

Proceedings Article | 3 November 2011 Paper

Paper

Holographic gratings implemented in a photopolymerizable glass: application to femtosecond laser pulses shaping

M. Hernández-Garay, O. Martínez-Matos, J. Izquierdo, M. Calvo, P. Cheben, L. Bañares

Proceedings Volume 8011, 80110I (2011) https://doi.org/10.1117/12.901915

KEYWORDS: Diffraction gratings, Glasses, Holography, Femtosecond phenomena, Diffraction, Ultrafast phenomena, Laser induced damage, Optical filters, Laser damage threshold, Volume holography

Read Abstract +

Proceedings Article | 8 September 2011 Paper

Paper

Athermal silicon subwavelength grating waveguides

M. Ibrahim, J. Schmid, P. Cheben, J. Lapointe, S. Janz, P. Bock, A. Densmore, B. Lamontagne, R. Ma, D.-X. Xu, W. Ye

Proceedings Volume 8007, 80071L (2011) https://doi.org/10.1117/12.905685

KEYWORDS: Waveguides, Silicon, Polarization, Thermal optics, Polymers, Polymer multimode waveguides, Numerical simulations, Refractive index, Diffraction gratings, Silicon photonics

Read Abstract +

Proceedings Article | 26 July 2011 Paper

Paper

Study of holographic diffraction gratings implemented in photopolymerizable glasses incorporating ionic liquid

A. Velasco, M. P. Hernández-Garay, M. L. Calvo, P. Cheben, F. del Monte

Proceedings Volume 8001, 80010N (2011) https://doi.org/10.1117/12.891523

KEYWORDS: Glasses, Refractive index, Diffraction gratings, Holography, Modulation, Diffusion, Liquids, Diffraction, Scattering, Polymerization

Read Abstract +

Proceedings Article | 18 February 2011 Paper

Paper

Improved coupling to integrated spatial heterodyne spectrometers with applications to space

A. Scott, P. Bock, C. Ramos, B. Lamontagne, P. Cheben, M. Florjańczyk, I. Fernandez, S. Janz, A. Ortega-Monux, B. Solheim, D.-X. Xu

Proceedings Volume 7928, 79280K (2011) https://doi.org/10.1117/12.877208

KEYWORDS: Spectrometers, Waveguides, Heterodyning, Fourier transforms, Etching, Remote sensing, Spectral resolution, Finite-difference time-domain method, Waveguide modes, Sensors

Read Abstract +

Proceedings Article | 8 February 2011 Paper

Paper

Silicon photonic wire evanescent field sensors: sensor arrays and instrumentation

S. Janz, A. Densmore, D.-X. Xu, P. Cheben, R. Ma, J. Schmid, A. Delâge, M. Vachon, J. Lapointe, N. Sabourin, W. Sinclair, Y. Li, T. Mischki, G. Lopinski, R. MacKenzie, Q. Liu, E. Post, B. Lamontagne, R. Halir, I. Molina-Fernandez

Proceedings Volume 7888, 788805 (2011) https://doi.org/10.1117/12.875471

KEYWORDS: Sensors, Waveguides, Molecules, Silicon, Silicon photonics, Resonators, Microfluidics, Molecular photonics, Refractive index, Waveguide modes

Read Abstract +

Proceedings Article | 19 January 2011 Paper

Paper

Subwavelength and diffractive waveguide structures and their applications in nanophotonics and sensing

P. Cheben, P. Bock, J. Schmid, J. Lapointe, S. Janz, D.-X. Xu, R. Ma, A. Densmore, A. Delâge, B. Lamontagne, T. Hall, R. Halir, I. Molina-Fernández, J.-M. Fédéli

Proceedings Volume 7941, 794111 (2011) https://doi.org/10.1117/12.875431

KEYWORDS: Waveguides, Silicon, Refractive index, Polarization, Fiber couplers, Cladding, Light wave propagation, Nanostructures, Photonics, Planar waveguides

Read Abstract +

Proceedings Article | 18 January 2011 Paper

Paper

Advances in photonics design and modeling for nano- and bio-photonics applications

Stoyan Tanev, Valery Tuchin, Pavel Cheben, Przemek Bock, Jens Schmid, James Pond

Proceedings Volume 7747, 77470W (2011) https://doi.org/10.1117/12.881624

KEYWORDS: Waveguides, Finite-difference time-domain method, Gold, Refractive index, Silicon, Biomedical optics, Geometrical optics, Nanoparticles, Photonics, Phase contrast

Read Abstract +

Proceedings Article | 17 January 2011 Paper

Paper

Engineering light at the sub-wavelength scale using silicon photonics

S. Janz, P. Cheben, J. Schmid, P. Bock, R. Halir, D.-X. Xu, A. Densmore, R. Ma, I. Molina-Fernandez, A. Delâge, M. Vachon, J. Lapointe, W. Sinclair, E. Post, B. Lamontagne

Proceedings Volume 7943, 79430G (2011) https://doi.org/10.1117/12.875488

KEYWORDS: Waveguides, Sensors, Silicon, Cladding, Silicon photonics, Etching, Waveguide sensors, Refractive index, Electron beam lithography, Waveguide modes

Read Abstract +

Proceedings Article | 18 February 2010 Paper

Paper

Development of a slab waveguide spatial heterodyne spectrometer for remote sensing

Miroslaw Florjańczyk, Pavel Cheben, Siegfried Janz, Boris Lamontagne, Jean Lapointe, Alan Scott, Brian Solheim, Dan-Xia Xu

Proceedings Volume 7594, 75940R (2010) https://doi.org/10.1117/12.842369

KEYWORDS: Waveguides, Spectroscopy, Calibration, Heterodyning, Silicon, Sensors, Detector arrays, Fourier transforms, Mach-Zehnder interferometers, Optical filters

Read Abstract +

Proceedings Article | 17 February 2010 Paper

Paper

Applications of subwavelength grating structures in silicon-on-insulator waveguides

Jens Schmid, Przemek Bock, Pavel Cheben, William Sinclair, Jaime García, Siegfried Janz, Jean Lapointe, Geoffrey Aers, Daniel Poitras, Yunhui Li, Gregory Lopinski, André Delâge, Adam Densmore, Boris Lamontagne, Rubin Ma, Dan-Xia Xu

Proceedings Volume 7606, 76060F (2010) https://doi.org/10.1117/12.841022

KEYWORDS: Waveguides, Silicon, Photonics, Refractive index, Sensors, Dispersion, Reflectivity, Dielectrics, Silicon photonics, Fiber couplers

Read Abstract +

Proceedings Article | 17 February 2010 Paper

Paper

Arrays of SOI photonic wire biosensors for label-free molecular detection

Adam Densmore, Dan-Xia Xu, Martin Vachon, Siegfried Janz, Rubin Ma, Yunhui Li, Gregory Lopinski, Christian Luebbert, Qing Liu, Jens Schmid, André Delâge, Pavel Cheben

Proceedings Volume 7606, 76060C (2010) https://doi.org/10.1117/12.842027

KEYWORDS: Sensors, Waveguides, Microfluidics, Biosensors, Mach-Zehnder interferometers, Molecular photonics, Silicon photonics, Infrared sensors, Waveguide modes, Phase shifts

Read Abstract +

Proceedings Article | 31 July 2009 Paper

Paper

Photopolymerizable glass with high refractive index species: overview of emerging implementations

M. Calvo, O. Martínez-Matos, J. Rodrigo, T. Alieva, M. Hernández-Garay, E. Martí, P. Cheben

Proceedings Volume 7505, 750516 (2009) https://doi.org/10.1117/12.838517

KEYWORDS: Holography, Diffraction gratings, Diffraction, Glasses, Refractive index, Volume holography, Modulation, Holographic materials, Polarizers, Holograms

Read Abstract +

Proceedings Article | 18 May 2009 Paper

Paper

Slab waveguide spatial heterodyne spectrometers for remote sensing from space

Miroslaw Florjanczyk, Pavel Cheben, Siegfried Janz, Boris Lamontagne, Jean Lapointe, Alan Scott, Brian Solheim, Dan-Xia Xu

Proceedings Volume 7356, 73560V (2009) https://doi.org/10.1117/12.820924

KEYWORDS: Waveguides, Spectrometers, Heterodyning, Interferometers, Silicon, Wavefronts, Fourier transforms, Calibration, Spectral resolution, Remote sensing

Read Abstract +

Proceedings Article | 24 February 2009 Paper

Paper

Micro-interferometer with high throughput for remote sensing

Alan Scott, Mirosław Florjańczyk, Pavel Cheben, Siegfried Janz, Brian Solheim, Dan-Xia Xu

Proceedings Volume 7208, 72080G (2009) https://doi.org/10.1117/12.808271

KEYWORDS: Waveguides, Spectroscopy, Remote sensing, Signal to noise ratio, Sensors, Fourier transforms, Spectral resolution, Detector arrays, Silicon, Calibration

Read Abstract +

Proceedings Article | 18 February 2009 Paper

Paper

Sub-wavelength grating gradient index mode transformers in high index contrast slab waveguides

P. Bock, P. Cheben, J. Schmid, D.-X. Xu, S. Janz, T. Hall

Proceedings Volume 7220, 722005 (2009) https://doi.org/10.1117/12.809736

KEYWORDS: Etching, Waveguides, Transformers, Polarization, Diffraction gratings, Silicon, Gradient-index optics, Finite-difference time-domain method, Teeth, GRIN lenses

Read Abstract +

Proceedings Article | 10 February 2009 Paper

Paper

Optoelectronic integration of silicon photonic wire biosensors

A. Densmore, S. Janz, D.-X. Xu, M. Vachon, P. Waldron, J. Schmid, J. Lapointe, T. Mischki, G. Lopinski, A. Delâge, P. Cheben, R. Ma

Proceedings Volume 7219, 72190M (2009) https://doi.org/10.1117/12.811602

KEYWORDS: Waveguides, Sensors, Molecules, Silicon photonics, Silicon, Resonators, Optical fibers, Biosensors, Mach-Zehnder interferometers, Cladding

Read Abstract +

Proceedings Article | 10 February 2009 Paper

Paper

Multi-aperture Fourier spectrometers in planar waveguides

Miroslaw Florjanczyk, Pavel Cheben, Siegfried Janz, Boris Lamontagne, Jean Lapointe, Alan Scott, Kenneth Sinclair, Brian Solheim, Dan-Xia Xu

Proceedings Volume 7218, 721816 (2009) https://doi.org/10.1117/12.810724

KEYWORDS: Waveguides, Spectrometers, Interferometers, Silicon, Heterodyning, Planar waveguides, Mach-Zehnder interferometers, Fabry–Perot interferometry, Spectral resolution, Apodization

Read Abstract +

Proceedings Article | 12 August 2008 Paper

Paper

Broadband polarization compensation in silicon-on-insulator components using cladding stress engineering

Dan-Xia Xu, André Delâge, Siegfried Janz, Pavel Cheben

Proceedings Volume 7099, 70991O (2008) https://doi.org/10.1117/12.807478

KEYWORDS: Birefringence, Waveguides, Cladding, Polarization, Resonators, Silicon, Brain-machine interfaces, Oxides, Dispersion, Silica

Read Abstract +

Proceedings Article | 12 August 2008 Paper

Paper

Spatial heterodyne planar waveguide spectrometer: theory and design

Miroslaw Florjanczyk, Pavel Cheben, Siegfried Janz, Alan Scott, Brian Solheim, Dan-Xia Xu

Proceedings Volume 7099, 70991L (2008) https://doi.org/10.1117/12.806822

KEYWORDS: Calibration, Spectroscopy, Waveguides, Heterodyning, Bismuth, Planar waveguides, Error analysis, Mach-Zehnder interferometers, Spectrometer engineering, Fourier transforms

Read Abstract +

Proceedings Article | 13 February 2008 Paper

Paper

Spotter-compatible SOI waveguide devices for biomolecular sensing

Adam Densmore, Dan-Xia Xu, Philip Waldron, Siegfried Janz, Jean Lapointe, Trevor Mischki, Gregory Lopinski, André Delâge, Pavel Cheben

Proceedings Volume 6898, 68981B (2008) https://doi.org/10.1117/12.763699

KEYWORDS: Waveguides, Sensors, Resonators, Mach-Zehnder interferometers, Silicon, Silicon photonics, Molecules, Semiconducting wafers, Biosensing, Waveguide sensors

Read Abstract +

Proceedings Article | 12 February 2008 Paper

Paper

Demultiplexer with blazed waveguide sidewall grating and subwavelength grating structure

Przemek Bock, Pavel Cheben, Jens Schmid, Dan-Xia Xu, Siegfried Janz, Trevor Hall

Proceedings Volume 6896, 68960H (2008) https://doi.org/10.1117/12.763357

KEYWORDS: Waveguides, Diffraction gratings, Demultiplexers, Silicon, Modulation, Diffraction, Phase shift keying, GRIN lenses, Apodization, Optical design

Read Abstract +

Proceedings Article | 30 October 2007 Paper

Paper

Mirror cavity MMI-coupled photonic wire resonator in SOI

P. Bock, P. Cheben, D.-X. Xu, S. Janz, T. Hall

Proceedings Volume 6796, 67963N (2007) https://doi.org/10.1117/12.779226

KEYWORDS: Brain-machine interfaces, Resonators, Waveguides, Mirrors, Silicon, Finite-difference time-domain method, Multimode interference devices, Wave propagation, Polarization, Optoelectronic devices

Read Abstract +

Proceedings Article | 30 October 2007 Paper

Paper

Planar waveguide spatial heterodyne spectrometer

Mirosław Florjańczyk, Pavel Cheben, Siegfried Janz, Alan Scott, Brian Solheim, Dan-Xia Xu

Proceedings Volume 6796, 67963J (2007) https://doi.org/10.1117/12.779056

KEYWORDS: Waveguides, Spectroscopy, Birefringence, Heterodyning, Glasses, Planar waveguides, Absorption, Apodization, Polarization, Interferometers

Read Abstract +

Proceedings Article | 26 October 2007 Paper

Paper

Subwavelength grating structures in planar waveguide facets for modified reflectivity

Jens Schmid, Pavel Cheben, Siegfried Janz, Jean Lapointe, Edith Post, André Delâge, Adam Densmore, Boris Lamontagne, Philip Waldron, Dan-Xia Xu

Proceedings Volume 6796, 67963E (2007) https://doi.org/10.1117/12.779053

KEYWORDS: Reflectivity, Waveguides, Finite-difference time-domain method, Silicon, Polarization, Modulation, Antireflective coatings, GRIN lenses, Refractive index, Planar waveguides

Read Abstract +

Proceedings Article | 26 October 2007 Paper

Paper

Label-free biosensing using silicon planar waveguide technology

Adam Densmore, Dan-Xia Xu, Philip Waldron, Siegfried Janz, André Delâge, G. Lopinski, T. Mischki, Pavel Cheben, Edith Post, Jean Lapointe, Jens Schmid

Proceedings Volume 6796, 67962X (2007) https://doi.org/10.1117/12.778936

KEYWORDS: Waveguides, Sensors, Silicon, Silicon photonics, Planar waveguides, Refractive index, Mach-Zehnder interferometers, Cladding, Waveguide modes, Photonics

Read Abstract +

SPIE Journal Paper | 1 October 2007

Group-index birefringence and loss measurements in silicon-on-insulator photonic wire waveguides

David Duchense, Pavel Cheben, Roberto Morandotti, Boris Lamontagne, Dan-Xia Xu, Siegfried Janz, Demetrios Christodoulides

OE, Vol. 46, Issue 10, 104602, (October 2007) https://doi.org/10.1117/12.10.1117/1.2793711

KEYWORDS: Waveguides, Birefringence, Polarization, Silicon, Dispersion, Silicon photonics, Light wave propagation, Reflectivity, Optical engineering, Wave propagation

Read Abstract +

Proceedings Article | 1 August 2007 Paper

Paper

On some physical properties of a new photopolymerisable glass with high refractive index species for holographic data storage

Maria Calvo, P. Cheben, O. Martínez-Matos, J. Rodrigo, F. del Monte

Proceedings Volume 6785, 67850V (2007) https://doi.org/10.1117/12.757845

KEYWORDS: Diffraction, Refractive index, Diffraction gratings, Holography, Modulation, Glasses, Polarization, Data storage, Crystals, Volume holography

Read Abstract +

Proceedings Article | 9 February 2007 Paper

Paper

Thin silicon waveguides for biological and chemical sensing

Adam Densmore, Dan-Xia Xu, Philip Waldron, Siegfried Janz, André Delâge, Pavel Cheben, Jean Lapointe

Proceedings Volume 6477, 647718 (2007) https://doi.org/10.1117/12.700916

KEYWORDS: Waveguides, Sensors, Silicon, Polarization, Resonators, Cladding, Biological and chemical sensing, Refractive index, Brain-machine interfaces, Waveguide modes

Read Abstract +

Proceedings Article | 9 February 2007 Paper

Paper

Polarization-insensitive MMI-coupled ring resonators in silicon-on-insulator using cladding stress engineering

Dan-Xia Xu, Pavel Cheben, Andre Delâge, Siegfried Janz, Boris Lamontagne, Edith Post, Winnie Ye

Proceedings Volume 6477, 64770D (2007) https://doi.org/10.1117/12.701997

KEYWORDS: Waveguides, Resonators, Polarization, Brain-machine interfaces, Cladding, Birefringence, Oxides, Silicon, Etching, Directional couplers

Read Abstract +

Proceedings Article | 20 July 2006 Paper

Paper

Performance comparison of an anamorphic spatial heterodyne spectrometer with conventional spectrometer

Ian Powell, Pavel Cheben

Proceedings Volume 6342, 63422C (2006) https://doi.org/10.1117/12.692225

KEYWORDS: Spectroscopy, Heterodyning, Spectral resolution, Sensors, Interferometers, Charge-coupled devices, Fourier transforms, Diffraction gratings, Performance modeling, Collimators

Read Abstract +

Proceedings Article | 7 March 2005 Paper

Paper

Design of polarization-insensitive components using geometrical and stress-induced birefringence in SOI waveguides

Dan-Xia Xu, Winnie Ye, Alexei Bogdanov, Dan Dalacu, Andre Delage, Pavel Cheben, Siegfried Janz, Boris Lamontagne, Marie-Josee Picard

Proceedings Volume 5730, (2005) https://doi.org/10.1117/12.589158

KEYWORDS: Waveguides, Birefringence, Cladding, Oxides, Silicon, Etching, Polarization, Wave propagation, Refractive index, Solids

Read Abstract +

We review the use of the oxide cladding stress induced photoelastic effect to eliminate the modal birefringence in silicon-on-insulator (SOI) ridge waveguide components, and highlight characteristics particular to high index contrast (HIC) systems. The birefringence in planar waveguides has its origin in the electromagnetic boundary conditions at the waveguide boundaries, and can be further modified by the presence of stress in the materials. It is shown that geometrical constraints imposed by different design and fabrication considerations become increasingly difficult to satisfy with decreasing core sizes. On the other hand, with typical stress levels of -100 MPa to -400 MPa (compressive) in SiO₂ used as the upper cladding, the effective indices are altered up to the order of 10^-3 for ridges with heights ranging from 1 μm to 5 μm. We demonstrate that the stress can be effectively used to balance the geometrical birefringence. Birefringence-free operation is achieved for waveguides with otherwise large birefringence by using properly chosen thickness and stress of the upper cladding layer. This allows the waveguide cross-section profiles to be optimized for design criteria other than zero-birefringence. Since the index changes induced by the stress are orders of magnitude smaller than the waveguide core/cladding index contrast, changes in the mode profiles are insignificant and the associated mode mismatch loss is negligible. We study the stress-induced effects in two parallel waveguides of varying spacing, to emulate the condition in directional couplers and ring-resonators. In the arrayed waveguide grating (AWG) demultiplexers fabricated in the SOI platform, we demonstrated the reduction of the birefringence from 1.3x10^-3 (without the upper cladding) to below 1x10^-4 across the spectral band by using a 0.6 μm oxide upper cladding with a stress of -320 MPa (compressive). Design options for relaxed dimensional tolerance and improved coupler performance made available by using stress engineering are discussed.

Proceedings Article | 17 January 2005 Paper

Paper

A 100-channel near-infrared SOI waveguide microspectrometer: design and fabrication challenges

Pavel Cheben, Alexei Bogdanov, Andre Delage, Siegfried Janz, Boris Lamontagne, Marie-Josee Picard, Edith Post, Dan-Xia Xu

Proceedings Volume 5644, (2005) https://doi.org/10.1117/12.573895

KEYWORDS: Waveguides, Silicon, Sensors, Actuators, Spectral resolution, Optoelectronics, Etching, Optoelectronic devices, Environmental sensing, Biological and chemical sensing

Read Abstract +

Proceedings Article | 21 October 2004 Paper

Paper

A wavelength demultiplexer based on waveguide broadening in silicon-on-insulator platform

Oscar Martinez Matos, Maria Calvo, Pavel Cheben, Andre Delage, Siegfried Janz, Dan-Xia Xu

Proceedings Volume 5622, (2004) https://doi.org/10.1117/12.591553

KEYWORDS: Waveguides, Demultiplexers, Silicon, Dispersion, Radio propagation, Phase shifts, Wave propagation, Channel projecting optics, Signal attenuation, Numerical simulations

Read Abstract +

Proceedings Article | 1 July 2004 Paper

Paper

Stress-induced birefringence in silicon-on-insulator (SOI) waveguides

Winnie Ye, Dan-Xia Xu, Siegfried Janz, Pavel Cheben, Andre Delage, Marie-Josee Picard, Boris Lamontagne, N. Garry Tarr

Proceedings Volume 5357, (2004) https://doi.org/10.1117/12.529602

KEYWORDS: Waveguides, Birefringence, Cladding, Silicon, Oxides, Polarization, Etching, Photoelasticity, Demultiplexers, Tolerancing

Read Abstract +

Proceedings Article | 30 May 2003 Paper

Paper

Birefringence compensation in silicon-on-insulator planar waveguide demultiplexers using a buried oxide layer

Pavel Cheben, Dan-Xia Xu, Siegfried Janz, Andre Delage, Dan Dalacu

Proceedings Volume 4997, (2003) https://doi.org/10.1117/12.476661

KEYWORDS: Waveguides, Birefringence, Polarization, Amorphous silicon, Silicon, Demultiplexers, Oxides, Refractive index, Planar waveguides, Etching

Read Abstract +

The high index contrast of silicon-on-insulator (SOI) enables the scaling down of planar waveguide components into the microphotonic regime, but has the unwanted consequence of inducing a large TE-TM polarization birefringence. For ridge waveguides this birefringence can be reduced to an acceptable level by using appropriate ridge dimensions [1], but with decreasing Si thickness the required fabrication tolerances quickly become too narrow to implement this solution. Components with slab waveguide regions such as echelle grating demultiplexers cannot be made polarization independent using this method. An alternate approach is to introduce a polarization compensation region in the combiner section of an AWG or echelle grating to eliminate the polarization dependent wavelength shift[2]. In its original implementation, the compensator is fabricated by changing the local waveguide thickness. The resulting birefringence correction can be sensitive to errors in etch depth, and the mode mismatch between compensator and slab waveguide sections is a source of approximately 1 dB extra insertion loss (IL) for SOI demultiplexers with Si waveguide thickness in the range from 2 to 5 m. We describe a new compensator structure for the SOI platform using a buried low index layer, in this case SiO2 sandwiched between the Si waveguide layer and another Si cap layer. Such a silicon-oxide-silicon (SOS) compensator on SOI can eliminate the TE-TM wavelength shift of an SOI AWG or echelle grating demultiplexer without introducing a significant mode mismatch between the compensator and slab waveguide sections. A demultiplexer with an SOS compensator has almost 1 dB lower insertion loss of an equivalent device with an etched compensator. The SOS compensator is easily implemented using standard oxide and a-Si or polysilicon deposition techniques. In this paper we present calculations and experimental results on the effective birefringence compensation, PDL and IL of SOS compensators in SOI waveguide demultiplexers.

Proceedings Article | 21 April 2003 Paper

Paper

Scaling down photonic waveguide devices on the SOI platform

Pavel Cheben, Dan-Xia Xu, Siegfried Janz, Andre Delage

Proceedings Volume 5117, (2003) https://doi.org/10.1117/12.498795

KEYWORDS: Waveguides, Birefringence, Silicon, Polarization, Demultiplexers, Refractive index, Oxides, Etching, Dielectric polarization, Amorphous silicon

Read Abstract +

Proceedings Article | 18 May 2001 Paper

Paper

Polarization compensation in silicon-on-insulator arrayed waveguide grating devices

Pavel Cheben, Andrew Bezinger, Andre Delage, Lynden Erickson, Siegfried Janz, Dan-Xia Xu

Proceedings Volume 4293, (2001) https://doi.org/10.1117/12.426939

KEYWORDS: Waveguides, Polarization, Etching, Demultiplexers, Silicon, Dispersion, Birefringence, Output couplers, Waveguide modes, Wavelength division multiplexing

Read Abstract +

Proceedings Article | 18 May 2001 Paper

Paper

Novel waveguide MSM photodetectors on SOI substrates using silicides

Dan-Xia Xu, Siegfried Janz, Pavel Cheben, Andre Delage

Proceedings Volume 4293, (2001) https://doi.org/10.1117/12.426927

KEYWORDS: Silicon, Electrodes, Waveguides, Sensors, Photodetectors, Absorption, Quantum efficiency, Metals, Mirrors, Near infrared

Read Abstract +

Proceedings Article | 2 October 1997 Paper

Paper

Bragg gratings in ORMOCERs

Tomas Belenguer, Pavel Cheben, Eva Moreno-Barriuso, Armonia Nunez, Manuel Ulibarrena, Francisco del Monte, David Levy

Proceedings Volume 3136, (1997) https://doi.org/10.1117/12.284113

KEYWORDS: Diffraction gratings, Diffraction, Holography, Ultraviolet radiation, Silica, Fiber Bragg gratings, Modulation, Helium neon lasers, Scattering, Holographic materials

Read Abstract +

Proceedings Article | 1 September 1996 Paper

Paper

Substrate mode hologram for high efficient aberration-free coupling between collimated and uncollimated beams

Pavel Cheben

Proceedings Volume 2778, 277823 (1996) https://doi.org/10.1117/12.2298957

Read Abstract +

Showing 5 of 134 publications

Proceedings Volume Editor (17)

SPIE Conference Volume | 5 April 2024

Integrated Optics: Devices, Materials, and Technologies XXVIII

SPIE Conference Volume | 30 June 2023

Integrated Optics: Design, Devices, Systems and Applications VII

SPIE Conference Volume | 26 April 2023

Integrated Optics: Devices, Materials, and Technologies XXVII

SPIE Conference Volume | 8 April 2022

Integrated Optics: Devices, Materials, and Technologies XXVI

SPIE Conference Volume | 10 May 2021

Integrated Optics: Design, Devices, Systems and Applications VI

Showing 5 of 17 publications

Conference Committee Involvement (42)

Integrated Optics: Devices, Materials, and Technologies XXIV

25 January 2025 | San Francisco, California, United States

Smart Photonic and Optoelectronic Integrated Circuits 2025

25 January 2025 | San Francisco, California, United States

Integrated Optics: Devices, Materials, and Technologies XXVIII

29 January 2024 | San Francisco, California, United States

Smart Photonic and Optoelectronic Integrated Circuits 2024

29 January 2024 | San Francisco, California, United States

Integrated Optics: Design, Devices, Systems, and Applications VII

24 April 2023 | Prague, Czech Republic

Smart Photonic and Optoelectronic Integrated Circuits 2023

31 January 2023 | San Francisco, California, United States

Integrated Optics: Devices, Materials, and Technologies XXVII

30 January 2023 | San Francisco, California, United States

Smart Photonic and Optoelectronic Integrated Circuits 2022

26 January 2022 | San Francisco, California, United States

Integrated Optics: Devices, Materials, and Technologies XXVI

24 January 2022 | San Francisco, California, United States

Integrated Optics: Design, Devices, Systems and Applications VI

19 April 2021 | Online Only, Czech Republic

Smart Photonic and Optoelectronic Integrated Circuits XXIII

6 March 2021 | Online Only, California, United States

Integrated Optics: Devices, Materials, and Technologies XXV

6 March 2021 | Online Only, California, United States

Smart Photonic and Optoelectronic Integrated Circuits XXII

3 February 2020 | San Francisco, California, United States

Integrated Optics: Devices, Materials, and Technologies XXIV

3 February 2020 | San Francisco, California, United States

Integrated Optics: Design, Devices, Systems and Applications

1 April 2019 | Prague, Czech Republic

Integrated Optics: Devices, Materials, and Technologies XXIII

4 February 2019 | San Francisco, California, United States

Smart Photonic and Optoelectronic Integrated Circuits XXI

2 February 2019 | San Francisco, California, United States

Smart Photonic and Optoelectronic Integrated Circuits XX

29 January 2018 | San Francisco, California, United States

Integrated Optics: Devices, Materials, and Technologies XXII

29 January 2018 | San Francisco, California, United States

Photonics Prague 2017

31 August 2017 | Prague, Czech Republic

Integrated Photonics: Materials, Devices, and Applications IV

9 May 2017 | Barcelona, Spain

Integrated Optics: Physics and Simulations

24 April 2017 | Prague, Czech Republic

Smart Photonic and Optoelectronic Integrated Circuits XIX

31 January 2017 | San Francisco, California, United States

Integrated Optics: Devices, Materials, and Technologies XXI

30 January 2017 | San Francisco, California, United States

Integrated Optics: Devices, Materials, and Technologies XX

15 February 2016 | San Francisco, California, United States

2015 International Conference on Optical Instruments and Technology: Micro/Nano Photonics and Fabrication

8 May 2015 | Beijing, China

Integrated Photonics: Materials, Devices, and Applications III

4 May 2015 | Barcelona, Spain

Integrated Optics: Physics and Simulations

13 April 2015 | Prague, Czech Republic

Integrated Optics: Devices, Materials, and Technologies XIX

9 February 2015 | San Francisco, California, United States

Integrated Optics: Devices, Materials, and Technologies XVIII

3 February 2014 | San Francisco, California, United States

Photonics North 2013

3 June 2013 | Ottawa, Canada

Integrated Photonics: Materials, Devices, and Applications II

24 April 2013 | Grenoble, France

Integrated Optics: Physics and Simulations

17 April 2013 | Prague, Czech Republic

Integrated Optics: Devices, Materials, and Technologies XVII

5 February 2013 | San Francisco, California, United States

Integrated Optics: Devices, Materials, and Technologies XVI

23 January 2012 | San Francisco, California, United States

Photonics Prague 2011

24 August 2011 | Prague, Czech Republic

Integrated Optics: Devices, Materials, and Technologies XV

24 January 2011 | San Francisco, California, United States

17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics

6 September 2010 | Liptovsky Jan, Slovakia

Integrated Optics: Devices, Materials, and Technologies XIV

25 January 2010 | San Francisco, California, United States

Integrated Optics: Devices, Materials, and Technologies XIII

26 January 2009 | San Jose, California, United States

Photonics North 2008

2 June 2008 | Montréal, Canada

Photonics North 2007

4 June 2007 | Ottawa, Canada

Showing 5 of 42 Conference Committees

SIGN IN TO:

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Advertisement

Advertisement