Broadband Coupler Published

Congratulations to Alam & Niklas for their recent publication in Optics Express. They proposed a compact (<8.5 µm) broadband coupler for silicon photonics using a hybrid plasmonic waveguide section. The coupler shows low insertion loss (<0.15 dB) and has a  3-dB power coupling ratio over a 150 nm bandwidth around 1.55 µm. The hybrid plasmonic waveguide is used to create an asymmetric section in the middle of a silicon nanowire waveguide coupler to introduce a phase delay, which causes the broadband response. [PDF | Journal]