Dispersion-engineered phase change material integrated silicon photonic modulators with controlled insertion losses

James Davis; Yihao Cui; Behrad Gholipour

doi:10.1117/12.2677460

4 October 2023 Dispersion-engineered phase change material integrated silicon photonic modulators with controlled insertion losses

James Davis, Yihao Cui, Behrad Gholipour

Author Affiliations +

Proceedings Volume 12647, Active Photonic Platforms (APP) 2023; 1264708 (2023) https://doi.org/10.1117/12.2677460
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

Photonic modulators have seen widespread use in optical circuitry, optical processing, and next-generational computing regimes such as neuromorphic computing. Prior research has focused on the incorporation of high-index functional materials on or adjacent to photonic circuit components such as modulators to enhance signal detection, modulation, and generation. The reversible, non-volatile transitions between optically and electrically unique amorphous and crystalline material phases inherent to chalcogenide phase-change materials (PCMs) present a promising material platform for this integration. However, current methods of incorporation combined with lossy material properties lead to integrations having large insertion losses and device footprints. Here we demonstrate that applying metamaterial effective medium theory enables dispersive engineering to drastically reduce insertion losses and footprints in PCM-loaded optical circuitry. Two configurations are explored, a metagrating and a multilayer, in which full-π modulator phase shifts are achieved in compact footprints down to 4.36 and 4.7 𝜇m with low insertion losses at a 1550nm wavelength.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

James Davis, Yihao Cui, and Behrad Gholipour "Dispersion-engineered phase change material integrated silicon photonic modulators with controlled insertion losses", Proc. SPIE 12647, Active Photonic Platforms (APP) 2023, 1264708 (4 October 2023); https://doi.org/10.1117/12.2677460

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