Efficient Silicon-based Graphene Waveguide Photodetector Based on Dual-Polarization Multiplexing

A compact silicon-based graphene waveguide photodetector integrated with a polarization multiplexing (fundamental TE and TM) optical circuit is proposed for efficient light absorption. The graphene absorption rate is 3.5 times higher than that of a single TE0-polarized waveguide photodetector, which will greatly reduce the length of the active region and thus improve the performance of bandwidth, dark current, and SNR.