Design of a multiband terahertz perfect absorber

被引：7

作者：

Hu, Dan ^{[1
]}

Wang, Hong-yan ^{[2
]}

Tang, Zhen-jie ^{[1
]}

Zhang, Xi-wei ^{[1
]}

Ju, Lin ^{[1
]}

Wang, Hua-ying ^{[3
]}

机构：

[1] Anyang Normal Univ, Coll Phys & Elect Engn, Anyang 455000, Peoples R China

[2] Anyang Normal Univ, Coll Media & Commun, Anyang 455000, Peoples R China

[3] Hebei Univ Engn, Coll Sci, Handan 056038, Peoples R China

来源：

CHINESE PHYSICS B | 2016年 / 25卷 / 03期

基金：

中国国家自然科学基金;

关键词：

multiband; terahertz; electromagnetic resonance; metamaterial absorber; METAMATERIAL ABSORBER; BROAD-BAND; ABSORPTION;

D O I：

10.1088/1674-1056/25/3/037801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A thin-flexible multiband terahertz metamaterial absorber (MA) has been investigated. Each unit cell of the MA consists of a simple metal structure, which includes the top metal resonator ring and the bottom metallic ground plane, separated by a thin-flexible dielectric spacer. Finite-difference time domain simulation indicates that this MA can achieve over 99% absorption at frequencies of 1.50 THz, 3.33 THz, and 5.40 THz by properly assembling the sandwiched structure. However, because of its asymmetric structure, the MA is polarization-sensitive and can tune the absorptivity of the second absorption peak by changing the incident polarization angle. The effect of the error of the structural parameters on the absorption efficiency is also carefully analyzed in detail to guide the fabrication. Moreover, the proposed MA exhibits high refractive-index sensing sensitivity, which has potential applications in multi-wavelength sensing in the terahertz region.

引用

页数：7