Selective silicon photonic polarizer with phase change material

Qingbo Wu; Shan Gao; Huan Li; Ming Zhang; Daoxin Dai

doi:10.1117/12.2686565

28 November 2023 Selective silicon photonic polarizer with phase change material

Qingbo Wu, Shan Gao, Huan Li, Ming Zhang, Daoxin Dai

Proceedings Volume 12764, Optoelectronic Devices and Integration XII; 127641A (2023) https://doi.org/10.1117/12.2686565
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

The management of polarization state is crucial for silicon photonics, however, it is often compromised by weak light-matter interactions, leading to the need for extending footprints of on-chip devices and huge power cost. In this paper, we propose a tunable silicon photonic polarizer designed to separate and manipulate polarization states based on selective silicon asymmetric directional couplers (ADCs) assisted with phase change material (PCM)[4]. The proposed polarizer includes a polarized beam splitter, a TE mode selective ADC assisted with PCM, a TM mode selective ADC assisted with PCM and a polarized light combiner. By tuning the GST of the TE/TM light selective ADC into crystalline state, phase matching occurs in the directional coupler between the hybrid waveguide and the bus waveguide, then the TE/TM modes can be efficiently excluded from the polarizer. On the other hand, by tuning the GST of the TE/TM light selective ADC into amorphous state, there is a phase mismatch between the hybrid waveguide and the bus waveguide, then the TE/TM light can pass through the bus waveguide and output from the polarized beam combiner. Simulation results indicate that this selective silicon photonic polarizer has a high extinction ratio over 37 dB for the TM mode and over 31 dB for the TE mode, with a minimal insertion loss of 1.2 dB for the input light.

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

Citation Download Citation

Qingbo Wu, Shan Gao, Huan Li, Ming Zhang, and Daoxin Dai "Selective silicon photonic polarizer with phase change material", Proc. SPIE 12764, Optoelectronic Devices and Integration XII, 127641A (28 November 2023); https://doi.org/10.1117/12.2686565

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