Ultra-compact optical switch based on Sb2Se3-assisted PhC-like subwavelength structures

Yuexing Su; Deming Liu; Minming Zhang

doi:10.1117/12.2606600

1 November 2021 Ultra-compact optical switch based on Sb₂Se₃-assisted PhC-like subwavelength structures

Yuexing Su, Deming Liu, Minming Zhang

Proceedings Volume 12057, Twelfth International Conference on Information Optics and Photonics; 120573M (2021) https://doi.org/10.1117/12.2606600
Event: Twelfth International Conference on Information Optics and Photonics, 2021, Xi'an, China

Abstract

Ultra-compact optical switch is a crucial module for densely integrated on-chip network. In recent years phase-change materials (PCMs) enable design of ultra-compact reconfigurable devices due to their drastic refractive index change during phase transition. In this work we inverse design a photonic-crystal-like (PhC-like) subwavelength optical switch assisted by novel ultralow loss PCM: Sb₂Se₃. At amorphous state the refractive index of Sb₂Se₃ is similar to that of silicon, so the device work as a MMI and light outputs at output port 2. At crystalline state the refractive index of Sb₂Se₃ increases to 4.05 and the subwavelength structure guides light to output port 1. The proposed switch has a compact footprint of 2.75 × 16 μm². At the center wavelength of 1550nm, the simulated insertion losses and crosstalks are 0.36 dB, -44.36 dB, 0.49 dB, and -40.37 dB under amorphous and crystalline states respectively.

Citation Download Citation

Yuexing Su, Deming Liu, and Minming Zhang "Ultra-compact optical switch based on Sb₂Se₃-assisted PhC-like subwavelength structures", Proc. SPIE 12057, Twelfth International Conference on Information Optics and Photonics, 120573M (1 November 2021); https://doi.org/10.1117/12.2606600

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