Efficient coupling of light from dielectric to HIMI plasmonic waveguide. (24th July 2019)

• Record Type: Journal Article
• Authors: Patel, Virendra; Srivastava, Kritarth; Sharma, Prateeksha; Kumar, V. Dinesh
• Is Part Of: Micro & nano letters. Volume 14:Number 8(2019)
• Page Start: 897
• Page End: 900
• Publication Date: 2019-07-24
• Subjects: optical losses -- optical couplers -- integrated optics -- plasmonics -- optical waveguides -- light reflection -- light propagation -- light transmission; conventional dielectric waveguide -- high transmission efficiency -- size 1.0 mum -- size 274.0 mum -- ultrashort tapered length -- hybrid insulator‐metal‐insulator plasmonic waveguide -- hybrid plasmonic tapered coupler -- propagation length -- HIMI plasmonic waveguide -- hybrid waveguide coupler -- low dielectric regions -- minimal mode propagation losses -- return loss -- maximum transmittance -- tapered coupling mechanism -- reflection losses; Nanotechnology -- Periodicals; Nanostructures -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1049/mnl.2018.5795
• Languages: English
• ISSNs: 1750-0443

Abstract

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.