Efficient coupling of light from dielectric to HIMI plasmonic waveguide

Virendra Patel; Kritarth Srivastava; Prateeksha Sharma; V. Dinesh Kumar

Efficient coupling of light from dielectric to HIMI plasmonic waveguide

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Author(s): Virendra Patel¹ ; Kritarth Srivastava¹ ; Prateeksha Sharma¹ ; V. Dinesh Kumar¹
- Affiliations: 1: Discipline of Electronics and Communication Engineering , PDPM Indian Institute of Information Technology, Design and Manufacturing , Jabalpur 482005 , India
Source: Volume 14, Issue 8, 24 July 2019, p. 897 – 900
DOI: 10.1049/mnl.2018.5795 , Online ISSN 1750-0443

Received 25/12/2018, Accepted 27/03/2019, Revised 07/03/2019, Published 24/07/2019

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 μm². Proposed hybrid waveguide coupler could be useful for several chip scale applications.

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