Tunable Fano resonance based on grating-coupled and graphene-based Otto configuration

Tunable Fano resonance based on grating-coupled and graphene-based Otto configuration

A grating-coupled Otto configuration consisting of multilayer films including a few layers of graphene and a germanium prism is proposed. A sharp and sensitive Fano resonance appears when a graphene surface plasmon polaritons (GSPPs) mode from the graphene-dielectric interface couple with the planar...

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Veröffentlicht in:Optics express 2017-10, Vol.25 (20), p.23880-23892
Hauptverfasser: Wang, Jicheng, Song, Ci, Hang, Jing, Hu, Zheng-Da, Zhang, Feng
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container_title Optics express
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creator Wang, Jicheng
Song, Ci
Hang, Jing
Hu, Zheng-Da
Zhang, Feng
description A grating-coupled Otto configuration consisting of multilayer films including a few layers of graphene and a germanium prism is proposed. A sharp and sensitive Fano resonance appears when a graphene surface plasmon polaritons (GSPPs) mode from the graphene-dielectric interface couple with the planar waveguide (PWG) mode. We utilize the classical harmonic oscillator (CHO) to explain Fano resonance and study the influence of various parameters of the configuration on the reflection spectra. The highly sensitive sensor can be achieved by introducing detected materials into Otto structure. In addition, we investigated the effects from material loss arising in our designs. All of the simulations are performed by a finite element method (FEM).
doi_str_mv 10.1364/OE.25.023880
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title Tunable Fano resonance based on grating-coupled and graphene-based Otto configuration
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