High-Performance 1×2 Optical Switch Based on $\text{Ge}_{2}\text{Sb}_{2}\text{Se}_{4}\text{Te}_{1}$-Assisted Racetrack Micro-Ring

A high-performance nonvolatile
$1\times 2$
optical switch based on the periodic structure
$\text{Ge}2\text{Sb}_{2}\mathrm{s}_{\mathrm{e}4}\text{Te}$
(GSST)-assisted racetrack micro-ring is proposed. The proposed on-chip optical switch is crucial to developing nonvolatile Si-GSST hybrid optical switches and realizing reconfigurable photonic systems.