Dual-band switchable terahertz metamaterial absorber based on metal nanostructure

Yubin Zhang; Chunlian Cen; Cuiping Liang; Zao Yi; Xifang Chen; Meiwen Li; Zigang Zhou; Yongjian Tang; Yougen Yi; Guangfu Zhang

Results in Physics (Sep 2019)

Dual-band switchable terahertz metamaterial absorber based on metal nanostructure

Yubin Zhang,
Chunlian Cen,
Cuiping Liang,
Zao Yi,
Xifang Chen,
Meiwen Li,
Zigang Zhou,
Yongjian Tang,
Yougen Yi,
Guangfu Zhang

Affiliations

Yubin Zhang: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China; Sichuan Civil-Military Integration Institute, Mianyang 621010, China
Chunlian Cen: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China; Sichuan Civil-Military Integration Institute, Mianyang 621010, China
Cuiping Liang: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China; Sichuan Civil-Military Integration Institute, Mianyang 621010, China
Zao Yi: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China; Sichuan Civil-Military Integration Institute, Mianyang 621010, China; Corresponding authors at: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China (Z. Yi).
Xifang Chen: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China; Sichuan Civil-Military Integration Institute, Mianyang 621010, China
Meiwen Li: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China; Sichuan Civil-Military Integration Institute, Mianyang 621010, China
Zigang Zhou: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China; Sichuan Civil-Military Integration Institute, Mianyang 621010, China
Yongjian Tang: Sichuan Civil-Military Integration Institute, Mianyang 621010, China
Yougen Yi: College of Physics and Electronics, Central South University, Changsha 410083, China
Guangfu Zhang: School of Communication and Electronic Engineering, Hunan City University, Yiyang 413000, China; Corresponding authors at: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China (Z. Yi).

Journal volume & issue: Vol. 14

Abstract

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In this paper, a tunable terahertz metamaterial absorber with two bands is proposed. It is composed of Au reflector, dielectric layer and periodic array of Au. By adjusting different materials and optimizing parameters, it can achieve the characteristics of both broadband and single peak absorption. In the range of 3.5–4.1 terahertz, the broadband absorption rate can reach over 90%, the relative bandwidth ratio is 17%, and the absorption peak at 7.15 THz can reach 98.9%. The coupling mechanism of broadband and unimodal absorption is studied by coupled mode theory. In addition, the designed absorber has broad application prospects in terahertz imaging and sensing due to its broadband and tunable characteristics. Keywords: Dual-band, Broadband, Terahertz, Metamaterials

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/

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