Periodic topology optimization‐based inverse design of slow-light in silicon nitride one-dimensional grating waveguides

Ahmet O. Sakin; Beyza Akcay; Ahmet C. Songur; Mehmet Unlu

doi:10.1117/12.3022492

18 June 2024 Periodic topology optimization‐based inverse design of slow-light in silicon nitride one-dimensional grating waveguides

Ahmet O. Sakin, Beyza Akcay, Ahmet C. Songur, Mehmet Unlu

Author Affiliations +

Proceedings Volume 13012, Integrated Photonics Platforms III; 1301206 (2024) https://doi.org/10.1117/12.3022492
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

Devices engineered for slowing light, utilizing one-dimensional grating waveguides and fabricated from silicon nitride, often necessitate large footprints to secure the required delay, a consequence of the material’s inherently low refractive index. Our approach employs a genetic algorithm to optimize 100×100nm^{^}2 etchings on a predetermined grating waveguide topology, allowing for either the selective guidance of peak pulse intensity of the output or the augmentation of true time delay within the identical unit length. Within the chosen predetermined topology, the optimal configuration was identified based on the properties of the signal excitation in the time domain. This approach significantly facilitates the application-specific selection of peak intensity decay rate and time delay behavior within a 1D grating waveguide system.

Conference Presentation

Citation Download Citation

Ahmet O. Sakin, Beyza Akcay, Ahmet C. Songur, and Mehmet Unlu "Periodic topology optimization‐based inverse design of slow-light in silicon nitride one-dimensional grating waveguides", Proc. SPIE 13012, Integrated Photonics Platforms III, 1301206 (18 June 2024); https://doi.org/10.1117/12.3022492

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