基于谐振波导光栅的偏振选择广角光探测器(英文)

Polarization-Selective and Wide-Angle Photodetector Based on Resonant Waveguide Grating

高性能偏振选择型光探测器是偏振检测系统中不可或缺的一部分。提出了一种由硅基谐振波导光栅和InP/InGaAs PIN光探测器混合集成的光探测器结构。利用严格耦合波分析方法设计了硅基谐振波导光栅结构,利用时域有限差分法优化了该混合集成光探测器的结构参数。数值仿真结果表明该光探测器在宽带范围内具有高量子效率、较大入射角容差及偏振选择性。该器件可以应用于偏振敏感系统中。

A polarization-selective photodetector with high performance is necessary for polarization sensitive systems. A hybrid integrated photodetector is proposed by integrating a silicon resonant waveguide grating with an InP/InGaAs PIN photodetector. The resonant waveguide grating is designed using rigorous coupled-wave analysis method. Parameters of the hybrid integrated photodetector are optimized by finite difference time domain method. The simulated results indicate that the proposed photodetector exhibits high quantum efficiency, large incident angle tolerance, and polarization selectivitv in a broadspectral range, which can be used in polarization sensitive systems.