Efficient coupling of light from dielectric to HIMI plasmonic waveguide. (24th July 2019) - Patel, Virendra
Abstract : This is the first report on the investigation of a hybrid plasmonic tapered coupler injecting light efficiently from conventional dielectric waveguide to a hybrid insulator–metal–insulator (HIMI) plasmonic waveguide. The proposed structure gives high transmission efficiency and suppresses the reflection losses significantly. With this tapered coupling mechanism, maximum transmittance and return loss of 98% and 26 dB have been observed, respectively. The coupler also offers very good propagation length (274 μm) along with minimal mode propagation losses (0.016 dB/µm). Apart from that, it offers decent confinement of light in low dielectric regions up to 32%. The proposed structure is designed in an ultra‐short tapered length of 1.0 µm, and the entire structure occupies a footprint area of 1.4 × 2.4 μm 2 . Proposed hybrid waveguide coupler could be useful for several chip scale applications.