Dr. Daniele Farnesi Profile

Dr. Daniele Farnesi

Permanent Researcher at Istituto di Fisica Applicata "Nello Carrara"

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Publications (22)

Proceedings Article | 31 May 2023 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

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Proceedings Article | 17 March 2023 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

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Proceedings Article | 5 March 2022 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

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Proceedings Article | 2 March 2020 Paper

Microresonators for compact optical sensors (uRCOS) for gas detection

Payal Singh, Logan Echeveria, Sara Harrison, Catherine Reinhardt, Victor Khitrov, Ken Heinz, Allan Chang, Gualtiero Nunzi-Conti, Daniele Farnesi, Tiziana Bond

Proceedings Volume 11266, 112661F (2020) https://doi.org/10.1117/12.2543815

KEYWORDS: Optical spheres, Carbon monoxide, Resonators, Etching, Glasses, Gases, Microresonators, Environmental sensing, Gas sensors, Tapered optical fibers

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Proceedings Article | 21 March 2019 Presentation + Paper

Cavity-ringdown-spectroscopy-based study of high Q resonators in add-drop configuration

Gabriele Frigenti, Mojtaba Arjmand, Andrea Barucci, Francesco Baldini, Simone Berneschi, Daniele Farnesi, Giancarlo Righini, Stefano Pelli, Silvia Soria, Ayda Aray, Yannick Dumeige, Patrice Féron, Gualtiero Nunzi Conti

Proceedings Volume 10904, 1090416 (2019) https://doi.org/10.1117/12.2509997

KEYWORDS: Resonators, Waveguides, Sensors, Nonlinear optics, Optical resonators, Signal detection, Signal attenuation, Laser resonators, Fiber couplers, Laser sources

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Proceedings Article | 13 March 2019 Presentation

Parametrical optomechanical oscillations in microbubble resonators: Suppression and enhancement of nonlinear phenomena (Conference Presentation)

Silvia Soria, Gualtiero Nunzi Conti, Daniele Farnesi, Andrea Barucci, Fulvio Ratto, Gabriele Frigenti, Xavier Rosello-Mecho, Miguel Andrés , Martina Delgado-Pinar, Giancarlo Righini

Proceedings Volume 10904, 109040Q (2019) https://doi.org/10.1117/12.2507004

KEYWORDS: Resonators, Spherical lenses, Acoustics, Phonons, Solids, Capillaries, Fabrication, Photons, Modulation, Scattering

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Proceedings Article | 4 March 2019 Presentation + Paper

Passive and active whispering gallery mode microresonators in optical engineering

Dario Laneve, Mario Falconi, Giuseppe Palma, Cosimo Scarnera, Francesco Chiavaioli, Daniele Farnesi , Tetsuo Kishi, Andrea Chiappini, Gualtiero Nunzi Conti, Silvia Soria, Virginie Nazabal, Francesco Baldini, Maurizio Ferrari, Francesco Prudenzano

Proceedings Volume 10904, 1090417 (2019) https://doi.org/10.1117/12.2512038

KEYWORDS: Waveguides, Microresonators, Refractive index, Erbium, Praseodymium, Glasses, Transmittance, Optical sensing, Absorption, Optical engineering

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Proceedings Article | 17 May 2018 Presentation + Paper

Glass based microresonators

S. Berneschi, F. Cosi, D. Farnesi, G. Frigenti, G. Righini, S. Pelli, S. Soria, F. Baldini, F. Prudenzano, G. Persichetti, R. Bernini, Y. Dumeige, P. Féron, D. Ristić, M. Ivanda, G. Nunzi Conti

Proceedings Volume 10683, 106830F (2018) https://doi.org/10.1117/12.2311459

KEYWORDS: Silica, Glasses, Microresonators, Resonators, Erbium, Coating, Optical spheres, Waveguides, Scattering, Light scattering

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Proceedings Article | 27 July 2016 Presentation

Localized immunoassay in flow-through optical microbubble resonator (Conference Presentation)

Simone Berneschi, Francesco Baldini, Alessandro Cosci, Franco Cosi, Daniele Farnesi, Gualtiero Nunzi Conti, Sara Tombelli, Cosimo Trono, Stefano Pelli, Ambra Giannetti

Proceedings Volume 9891, 98911M (2016) https://doi.org/10.1117/12.2227812

KEYWORDS: Resonators, Luminescence, Microfluidics, Biosensors, Spherical lenses, Glasses, Waveguides, Chemical analysis, Biosensing, Ultraviolet radiation

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The integration of the Whispering Gallery Modes (WGMs) resonators in a microfluidics platform represents an important feature towards the realization of a compact high performance label-free biosensor. These hollow resonant microstructures present the advantage to combine the WGM resonator properties with the intrinsic capability of integrated microfluidics. In this sense, optical microbubble resonators (OMBRs), intended as a hollow core spherical bulge realized in a glass microcapillary by a suitable fabrication process, with their high Q factors (< 107 in air) well satisfy this requirement. Their operation is based on the fact that, given a small enough wall thickness of the bubble, the WGM optical field extends on both sides of the wall, so that it is possible to couple light into the resonator from an outer waveguide, and at the same time to have interaction of the WGM field with the inner fluid and analyte. The biosensing mechanism of these devices is based on the WGMs morphological dependence: any change on the OMBR inner surface, due to some chemical and/or biochemical binding, causes a shift of the resonance position and reduces the Q factor of the OMBR. By measuring these changes, important information about the sensing capability of the device can be obtained. In order to develop an OMBR based biosensor and optimize its performance, a crucial step is represented by its chemical/biochemical functionalization. Here we present a novel technique able to guarantee that the chemical interaction occurs in the OMBR inner wall, leaving the other microfluidic parts completely inert from a biochemical point of view. The method is based on UV photoactivation, which allows to localize the biolayers only in correspondence of the OMBR inner wall. As a proof of concept, an immunoassay based on rabbit IgG/anti rabbit-IgG interaction was performed and. The anti rabbit-IgG antibody was labelled with Alexa Fluor 488 to verify, by a fluorescence characterization, the goodness of this procedure. Moreover, an anti mouse-IgG, labelled with the same fluorophore (Alexa Fluor 488) was used for specificity-tests of the IgG/anti-IgG interaction. The immunoassay based on fluorescence was characterized using an optical microscope (Zeiss AXIO inverted fluorescence microscope) working at the wavelengths of 470 nm for excitation of Alexa Fluor 488. The real time measurement of the resonance broadening after each functionalization step together with the high Q factor (< 105) measured after the IgG/anti-IgG interaction in water, gives a further proof for the method validity.

Proceedings Article | 22 April 2016 Paper

Third order nonlinear phenomena in silica solid and hollow whispering gallery mode resonators

D. Farnesi, A. Barucci, S. Berneschi, F. Cosi, G. Righini, G. Nunzi Conti, Silvia Soria

Proceedings Volume 9727, 97270K (2016) https://doi.org/10.1117/12.2212344

KEYWORDS: Raman spectroscopy, Silica, Resonators, Four wave mixing, Frequency combs, Nonlinear optics, Raman scattering, Microresonators, Solids, Capillaries, Electrodes

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Proceedings Article | 22 April 2016 Paper

Localized biomolecules immobilization in optical microbubble resonators

S. Berneschi, F. Baldini, A. Barucci, A. Cosci, F. Cosi, D. Farnesi, G. Nunzi Conti, G. Righini, S. Soria, S. Tombelli, C. Trono, S. Pelli, A. Giannetti

Proceedings Volume 9727, 972719 (2016) https://doi.org/10.1117/12.2213683

KEYWORDS: Resonators, Luminescence, Microfluidics, Biosensors, Capillaries, Microscopes, Silica, Ultraviolet radiation, Light emitting diodes, Optical microcavities

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Proceedings Article | 22 April 2016 Paper

Long period gratings based frequency selective interrogation of micro-resonators along the same fiber

D. Farnesi, F. Chiavaioli, F. Baldini, F. Cosi, G. Righini, S. Soria, C. Trono, G. Nunzi Conti

Proceedings Volume 9727, 972703 (2016) https://doi.org/10.1117/12.2213706

KEYWORDS: Cladding, Fiber couplers, Microresonators, Optical resonators, Multiplexing, Fiber optics sensors, Transducers, Micro optical resonators, Optical fibers, Optical spheres, Resonators, Silica, Signal attenuation, Ultraviolet radiation, Manufacturing, Laser sources

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Proceedings Article | 8 July 2015 Paper

Microbubble resonators as enhancement platforms for linear and nonlinear applications

Daniele Farnesi, Simone Berneschi, Giancarlo Righini, Gualtiero Nunzi Conti, Franco Quercioli, Silvia Soria

Proceedings Volume 9655, 965527 (2015) https://doi.org/10.1117/12.2185830

KEYWORDS: Resonators, Luminescence, Microscopes, Capillaries, Microresonators, Rhodamine, Silica, Electrodes, Sensors, Near infrared

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Proceedings Article | 5 May 2015 Paper

Optical micro-bubble resonators as promising biosensors

A. Giannetti, A. Barucci, S. Berneschi, A. Cosci, F. Cosi, D. Farnesi, G. Nunzi Conti, S. Pelli, S. Soria, S. Tombelli, C. Trono, G. Righini, F. Baldini

Proceedings Volume 9506, 950617 (2015) https://doi.org/10.1117/12.2180242

KEYWORDS: Capillaries, Resonators, Luminescence, Biosensors, Chemical analysis, Silica, Ultraviolet radiation, Microscopy, Optical microcavities, Microscopes

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Proceedings Article | 3 March 2015 Paper

Non-linear fluorescence excitation of Rhodamine 6G and TRITC labeled IgG in whispering gallery mode microresonators

Carme Pastells, M. Pilar Marco, David Merino-Arranz, Pablo Loza-Alvarez, Laura Pasquardini, Cecilia Pederzolli, Daniele Farnesi, Simone Berneschi, Giancarlo Righini, Gualtiero Nunzi Conti, Silvia Soria Huguet

Proceedings Volume 9343, 93430K (2015) https://doi.org/10.1117/12.2079112

KEYWORDS: Luminescence, Rhodamine, Microscopes, Microresonators, Resonators, Light scattering, Absorption, Capillaries, Sensors, Confocal microscopy

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Proceedings Article | 3 March 2015 Paper

Cladding modes fiber coupling to silica micro-resonators based on long period gratings

Daniele Farnesi, F. Chiavaioli, F. Cosi, G. Righini, S. Soria, C. Trono, G. Nunzi Conti

Proceedings Volume 9343, 934318 (2015) https://doi.org/10.1117/12.2080360

KEYWORDS: Cladding, Silica, Resonators, Microresonators, Fiber couplers, Light scattering, Signal attenuation, Capillaries, Optical fibers, Multimode fibers

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Proceedings Article | 1 May 2014 Paper

Coupling light to whispering gallery mode resonators

D. Farnesi, G. Righini, A. Barucci, S. Berneschi, F. Chiavaioli, F. Cosi, S. Pelli, S. Soria, C. Trono, D. Ristic, M. Ferrari, G. Nunzi Conti

Proceedings Volume 9133, 913314 (2014) https://doi.org/10.1117/12.2057611

KEYWORDS: Resonators, Silica, Coating, Waveguides, Optical spheres, Fiber couplers, Refractive index, Polarization, Luminescence, Harmonic generation

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Proceedings Article | 4 March 2014 Paper

Multicolour emission in silica whispering gallery mode microspherical resonators

Daniele Farnesi, Andrea Barucci, Simone Berneschi, Giancarlo Righini, Silvia Soria, Gualtiero Nunzi Conti

Proceedings Volume 8960, 896008 (2014) https://doi.org/10.1117/12.2039745

KEYWORDS: Silica, Resonators, Raman spectroscopy, Optical amplifiers, Harmonic generation, Optical spheres, Spherical lenses, Fiber couplers, Spectroscopy

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Proceedings Article | 13 March 2013 Paper

Impact of thermal oxidation, surface chemistry and porous silicon morphology for sensing applications

I. Kolmychek, D. Kopylov, T. Murzina, F. Baldini, S. Berneschi, D. Farnesi, A. Giannetti, S. Tombelli, G. Nunzi Conti, S. Soria

Proceedings Volume 8627, 86271E (2013) https://doi.org/10.1117/12.2007377

KEYWORDS: Silicon, Sensors, Thermal oxidation, Reflectivity, Chemistry, Refractive index, Annealing, Etching, Thermal sensing, Proteins

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Proceedings Article | 12 March 2013 Paper

Whispering gallery mode microresonators: results on aptasensors and on a new sensing approach

G. Nunzi Conti, F. Baldini, S. Berneschi, D. Farnesi, A. Giannetti, S. Soria, C. Trono, L. Lunelli, L. Pasquardini, C. Pederzolli

Proceedings Volume 8600, 86001O (2013) https://doi.org/10.1117/12.2004205

KEYWORDS: Fiber lasers, Resonators, Sensors, Proteins, Tunable lasers, Optical amplifiers, Microresonators, Biosensors, Laser resonators, Atomic force microscopy

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Proceedings Article | 27 February 2012 Paper

High Q silica microbubble resonators

D. Farnesi, A. Barucci, S. Berneschi, M. Brenci, F. Cosi, G. Nunzi Conti, S. Pelli, G. Righini, S. Soria

Proceedings Volume 8264, 826417 (2012) https://doi.org/10.1117/12.910282

KEYWORDS: Capillaries, Resonators, Water, Refractive index, Optical microcavities, Electrodes, Silica, Bioalcohols, Sensors, Microfluidics

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Proceedings Article | 7 February 2012 Paper

Coupling approaches and new geometries in whispering-gallery-mode resonators

G. Nunzi Conti, A. Barucci, S. Berneschi, M. Brenci, F. Cosi, D. Farnesi, S. Pelli, G. Righini, S. Soria

Proceedings Volume 8236, 82360V (2012) https://doi.org/10.1117/12.909596

KEYWORDS: Waveguides, Resonators, Polishing, Lithium niobate, Capillaries, Silica, Optical spheres, Quantum efficiency, Integrated optics, Refractive index

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Showing 5 of 22 publications

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