Abstract In this paper, a non-volatile polarization-insensitive 1 × 2 silicon optical switch utilizing phase-change materials is presented. The presented device is composed of three polarization beam combiners/splitters, two directional couplers with phase change materials, and a polarization-insensitive waveguide crossing. By adjusting the phase state of phase-change material, polarization-insensitive switching behavior is realized. As an example, the proposed switch using Ge2Sb2Te5 is comprehensively optimized and analyzed based on particle swarm optimization algorithm and finite difference time domain method. The designed device can have a crosstalk of less than − 15 . 98 dB and an insertion loss of smaller than 0.95 dB over the C-band in the case of TE polarization, while a maximum crosstalk of − 13 . 53 dB and a maximum insertion loss of 1.37 dB can be obtained within the C-band in the case of TM polarization.

中文翻译：

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使用相变材料的非易失性偏振不敏感 1×2 硅光开关

摘要 在本文中，提出了一种利用相变材料的非易失性偏振不敏感 1 × 2 硅光开关。所提出的设备由三个偏振光束组合器/分离器、两个具有相变材料的定向耦合器和一个对偏振不敏感的波导交叉组成。通过调整相变材料的相态，实现了对偏振不敏感的开关行为。例如，基于粒子群优化算法和有限差分时域方法对所提出的使用 Ge2Sb2Te5 的开关进行了综合优化和分析。设计的器件可以具有小于 - 15 的串扰。在 TE 极化的情况下，C 波段上的插入损耗为 98 dB，插入损耗小于 0.95 dB，而最大串扰为 − 13 . 53 dB，最大插入损耗为 1。