Open AccessTunable Fano resonance based on grating-coupled and graphene-based Otto configuration
Author(s) -
Jicheng Wang,
Ci Song,
Jing Hang,
Zheng-Da Hu,
Feng Zhang
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.023880
Subject(s) - fano resonance , optics , grating , materials science , prism , graphene , surface plasmon polariton , resonance (particle physics) , optoelectronics , waveguide , guided mode resonance , surface plasmon , planar , plasmon , surface plasmon resonance , diffraction grating , physics , nanotechnology , computer graphics (images) , particle physics , computer science , nanoparticle
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).