Shang Kun, Niu Lei, Jin Huimin, Wang Haoxian, Zhang Wei, Gan Fuwan, Xu Peipeng
Opt Lett. 2024 Feb 1;49(3):722-725. doi: 10.1364/OL.511301.
We propose a non-volatile 2 × 2 photonic switch based on multimode interference in an SbSe-loaded waveguide. The different modal symmetries of the TE and TE modes supported in the multimode region change their propagation constants distinctly upon the SbSe phase transition. Through careful optical design and FDTD optimization of the multimode waveguide dimensions, efficient switching is achieved despite the modest index contrast of SbSe relative to GeSbTe. The fabricated optical switch demonstrates favorable characteristics, including low insertion loss of ∼1 dB, a compact length of ∼27 µm, and small cross talk below -15 dB across a 35 nm bandwidth. Such non-volatile and broadband components will be critical for future high-density programmable photonic-integrated circuits for optical communications and signal processing.
我们提出了一种基于负载SbSe的波导中的多模干涉的非易失性2×2光子开关。在多模区域中支持的TE和TE模式的不同模式对称性在SbSe相变时会明显改变其传播常数。通过对多模波导尺寸进行精心的光学设计和FDTD优化，尽管SbSe相对于GeSbTe的折射率对比度适中，但仍实现了高效切换。所制备的光开关具有良好的特性，包括约1 dB的低插入损耗、约27 µm的紧凑长度以及在35 nm带宽内低于-15 dB的小串扰。这种非易失性和宽带组件对于未来用于光通信和信号处理的高密度可编程光子集成电路至关重要。
