Polarization-Independent Tunable Ultra-Wideband Meta-Absorber in Terahertz Regime

Electronics

Li Deng¹  Shufang Li¹  Shuxiang Liu¹  Meijun Qu¹ 

[1] Beijing Key Laboratory of Network System Architecture and Convergence, Beijing University of Posts and Telecommunications, Beijing 100876, China;

关键词: ultra-wideband;    THz absorber;    high absorption;    polarization independent;   

DOI  :  10.3390/electronics8080831

来源: DOAJ

【 摘 要 】

In this paper, we demonstrate an ultra-broadband terahertz bilayer graphene-based absorption structure. It has two stacking graphene layers sandwiched by an Au cylinders array, backed by a metallic ground plane. Au cylinders are used to adjust the input impedance to be closely matched to the free space, enabling an ultra-broadband absorption. The absorption spectrum of the bilayer graphene-based absorption structure with Au cylinder arrays shows a bandwidth of 7.1 THz, with the absorption exceeding 80%. The achieved ultra-wideband THz meta-absorber has high absorption, independence of polarization property, simultaneously, illustrating to be a promising candidate for teraherz broadband absorption application.

【 授权许可】

Unknown