Freestanding Bilayer Plasmonic Waveguide Coupling Mechanism for Ultranarrow Electromagnetic-induced Transparency Band Generation

Overview

Journal Sci Rep

Specialty Science

Date 2021 Jan 15

PMID 33446861

Citations 1

Authors

Li Yu

Yuzhang Liang

Shuwen Chu

Huixuan Gao

Qiao Wang

Wei Peng

Affiliations

Soon will be listed here.

Abstract

Strong electromagnetic coupling among plasmonic nanostructures paves a new route toward efficient manipulation of photons. Particularly, plasmon-waveguide systems exhibit remarkable optical properties by simply tailoring the interaction among elementary elements. In this paper, we propose and demonstrate a freestanding bilayer plasmonic-waveguide structure exhibiting an extremely narrow transmission peak with efficiency up to 92%, the linewidth of only 0.14 nm and an excellent out of band rejection. The unexpected optical behavior considering metal loss is consistent with that of electromagnetic induced transparency, arising from the destructive interference of super-radiative nanowire dipolar mode and transversal magnetic waveguide mode. Furthermore, for slow light application, the designed plasmonic-waveguide structure has a high group index of approximately 1.2 × 10 at the maximum of the transmission band. In sensing application, its lowest sensing figure of merit is achieved up to 8500 due to the ultra-narrow linewidth of the transmission band. This work provides a valuable photonics design for developing high performance nano-photonic devices.

Citing Articles

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