A tunable terahertz metamaterial absorber composed of elliptical ring graphene arrays with refractive index sensing application

Yunping Qi; Yu Zhang; Chuqin Liu; Ting Zhang; Baohe Zhang; Liyuan Wang; Xiangyu Deng; Yulong Bai; Xiangxian Wang

Results in Physics (Mar 2020)

A tunable terahertz metamaterial absorber composed of elliptical ring graphene arrays with refractive index sensing application

Yunping Qi,
Yu Zhang,
Chuqin Liu,
Ting Zhang,
Baohe Zhang,
Liyuan Wang,
Xiangyu Deng,
Yulong Bai,
Xiangxian Wang

Affiliations

Yunping Qi: College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China; Engineering Research Center of Gansu Provence for Intelligent Information Technology and Application, Northwest Normal University, Lanzhou 730070, China; Corresponding authors at: College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China (Y. Qi).
Yu Zhang: College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China; Corresponding authors at: College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China (Y. Qi).
Chuqin Liu: College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
Ting Zhang: College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
Baohe Zhang: College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
Liyuan Wang: College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
Xiangyu Deng: College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China; Engineering Research Center of Gansu Provence for Intelligent Information Technology and Application, Northwest Normal University, Lanzhou 730070, China
Yulong Bai: College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China; Engineering Research Center of Gansu Provence for Intelligent Information Technology and Application, Northwest Normal University, Lanzhou 730070, China
Xiangxian Wang: School of Science, Lanzhou University of Technology, Lanzhou 730050, China

Journal volume & issue: Vol. 16
p. 103012

Abstract

Read online

In this paper, we demonstrate a tunable absorber composed of periodically patterned elliptical ring graphene metamaterial arrays. An absorption peak at 53.6μm with the maximum absorption of 49.2% of pure graphene layer has been realized. The effects of different parameters are studied by the Finite Difference Time Domain (FDTD) method. Besides, we simulate the spectra as the surrounding refractive index changes to better evaluate the sensing performance of the structure, producing a structure with the sensitivity up to 14110 nm/RIU. Finally, this paper also analyzes the absorption characteristics of bilayer graphene structure, and has a tunable dual-band selective absorption effect with a maximum absorption of 49.6%. Based on the research, it is more convenient to design the graphene-based optoelectronic devices, biosensor and environmental monitor.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

About the journal

Abstract

Keywords