Implementation of Polarization Beam-Splitter based on DFB-Assisted Plasmonic Multimode Interference Coupler

Abstract

A novel ultracompact polarization beam-splitter (PBS) combining two plasmonic multimode interference couplers (P-MMICs) and DFB guiding structure is implemented. The  ×  and  ×  P-MMICs are designed to collect the polarized powers of TE and TM modes reflected by or transmitted through an internal DFB structure. The simulation results show that the designed DFB-assisted PBS is very short (about 75 ), and has a low insertion loss, a high extinction ratio, and a broad bandwidth of 20 nm.