Ultra-compact polarization-independent 3 dB power splitter in silicon

We experimentally demonstrate an ultra-compact polarization-independent 3 dB power splitter on the silicon-on-insulator platform. Subwavelength structure engineering is employed to balance the coupling coefficients of TE and TM polarizations as well as a footprint reduction. The device possesses ultra-compact (1.2 mu m x 2.62 mu m) and polarization-independent features with an operating bandwidth over 50 nm (from 1540 to 1590 nm). (C) 2021 Optical Society of America

Automated summary

In this study, an ultra-compact polarization-independent 3 dB power splitter on the silicon-on-insulator platform is experimentally demonstrated. Subwavelength structure engineering is utilized to balance the coupling coefficients of TE and TM polarizations while reducing the footprint. The device features ultra-compact size and operates over a bandwidth of over 50 nm.