Theoretical Investigation of a Simple Design of Triple-Band Terahertz Metamaterial Absorber for High-Q Sensing

Applied Sciences

Runyu Zhao¹  Tao Chen¹  Ben-Xin Wang² 

[1] School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China;School of Science, Jiangnan University, Wuxi 214122, China;

关键词: metamaterials;    triple-band absorption;    terahertz;    sensing;   

DOI  :  10.3390/app9071410

来源: DOAJ

【 摘 要 】

This paper presents a simple metamaterial design to achieve the triple-band near-perfect absorption response that can be used in the area of sensor application. The introduced absorber consists of an array of Au strip and a bulk flat Au film separated by an insulator dielectric layer. Three narrow-band resonance absorption peaks are obtained by superposing three different modes (a fundamental mode resonance and two high-order responses) of the Au strip. These resonance modes (in particular of the last two modes) have large sensitivity to the changes of the surrounding index, overlayer thickness and the refractive index of the overlayer.

【 授权许可】

Unknown