Polarization-independent dual-band terahertz metamaterial absorbers based on gold/parylene-C/silicide structure

被引：23
|
作者：
Wen, Yongzheng [1 ]
Ma, Wei [1 ]
Bailey, Joe [2 ,3 ,4 ]
Matmon, Guy [2 ,3 ]
Yu, Xiaomei [1 ]
Aeppli, Gabriel [2 ,3 ]
机构：
[1] Peking Univ, Inst Microelect, Natl Key Lab Sci & Technol Micro Nano Fabricat, Beijing 100871, Peoples R China
[2] UCL, London Ctr Nanotechnol, London WC1H 0AH, England
[3] UCL, Dept Phys & Astron, London WC1H 0AH, England
[4] UCL, Ctr Math & Phys Life Sci & Expt Biol, London WC1E 6BT, England
来源：
APPLIED OPTICS | 2013年 / 52卷 / 19期
基金：
英国工程与自然科学研究理事会; 中国国家自然科学基金;
关键词：
Absorption peaks - Absorptivities - Cobalt silicide - Dielectric layer - Dielectric spacers - Ground planes - Metamaterial absorbers - Polarization independent;
D O I：
10.1364/AO.52.004536
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We design, fabricate, and characterize dual-band terahertz (THz) metamaterial absorbers with high absorption based on structures consisting of a cobalt silicide (Co-Si) ground plane, a parylene-C dielectric spacer, and a metal top layer. By combining two periodic metal resonators that couple separately within a single unit cell, a polarization-independent absorber with two distinct absorption peaks was obtained. By varying the thickness of the dielectric layer, we obtain absorptivity of 0.76 at 0.76 THz and 0.97 at 2.30 THz, which indicates the Co-Si ground plane absorbers present good performance. (C) 2013 Optical Society of America
引用
收藏
页码：4536 / 4540
页数：5
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