Adjustable polarization-independent wide-incident-angle broadband far-infrared absorber  

作　　者：Jiu-Sheng Li Xu-Sheng Chen 李九生;陈旭生(Centre for THz Research,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]Centre for THz Research,China Jiliang University,Hangzhou 310018,China

出　　处：《Chinese Physics B》2020年第7期141-146,共6页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2016YFF0200306);the National Natural Science Foundation of China(Grant Nos.61871355 and 61831012).

摘　　要：To promote the application of far-infrared technology,functional far-infrared devices with high performance are needed.Here,we propose a design scheme to develop a wide-incident-angle far-infrared absorber,which consists of a periodically semicircle-patterned graphene sheet,a lossless inter-dielectric spacer and a gold reflecting film.Under normal incidence for both TE-and TM-polarization modes,the bandwidth of 90%absorption of the proposed far-infrared absorber is ranging from 6.76 THz to 11.05 THz.The absorption remains more than 90%over a 4.29-THz broadband range when the incident angle is up to 50◦for both TE-and TM-polarization modes.The peak absorbance of the absorber can be flexibly tuned from 10%to 100%by changing the chemical potential from 0 eV to 0.6 eV.The tunable broadband far-infrared absorber has promising applications in sensing,detection,and stealth objects.

关 键 词：far-infrared absorber semicircle-patterned graphene wide incident angle 

分 类 号：TN214[电子电信—物理电子学]