Multiple plasmonic resonance excitations on graphene metamaterials for ultrasensitive terahertz sensing

被引：103

作者：

Chen, Xu ^{[1
,2
]}

Fan, Wenhui ^{[1
]}

Song, Chao ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

CARBON | 2018年 / 133卷

基金：

中国国家自然科学基金;

关键词：

ELECTROMAGNETICALLY INDUCED TRANSPARENCY; SPECTROSCOPY; PLATFORM; LIGHT; INDEX;

D O I：

10.1016/j.carbon.2018.03.051

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A three-dimensional graphene metamaterial structure consisting of dielectric pillar arrays covered by graphene monolayer with metal layer underneath is proposed and investigated, which can realize the efficient excitations of multiple plasmonic resonance modes under incident terahertz (THz) wave. The multiple plasmonic resonance modes are highly sensitive to the change of analyte refractive index and thickness, and the frequency sensitivity of each resonance mode can reach up to 1.402, 1.687 and 1.643 THz per refractive index unit, respectively. By controlling the Fermi level of graphene, the resonance frequency can be tuned dynamically. Moreover, the proposed structure has three absorption peaks with absorptivity more than 95%, it is polarization-insensitive and can perform very well in a wide incident angles for transverse electric and transverse magnetic waves. This proposed structure can be utilized for active THz plasmonic devices such as multiple channel sensors and absorbers. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：416 / 422

页数：7

共 55 条

[1] Biomedical Sensing With Conductively Coupled Terahertz Metamaterial Resonators [J].