A terahertz polarization insensitive dual band metamaterial absorber

被引：456

作者：

Ma, Yong ^{[1
]}

Chen, Qin ^{[1
]}

Grant, James ^{[1
]}

Saha, Shimul C. ^{[1
]}

Khalid, A. ^{[1
]}

Cumming, David R. S. ^{[1
]}

机构：

[1] Univ Glasgow, Dept Elect & Elect Engn, Glasgow G12 8LT, Lanark, Scotland

来源：

OPTICS LETTERS | 2011年 / 36卷 / 06期

关键词：

INDEX;

D O I：

10.1364/OL.36.000945

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Metamaterial absorbers have attracted considerable attention for applications in the terahertz range. In this Letter, we report the design, fabrication, and characterization of a terahertz dual band metamaterial absorber that shows two distinct absorption peaks with high absorption. By manipulating the periodic patterned structures as well as the dielectric layer thickness of the metal-dielectric-metal structure, significantly high absorption can be obtained at specific resonance frequencies. Finite-difference time-domain modeling is used to design the structure of the absorber. The fabricated devices have been characterized using a Fourier transform IR spectrometer. The experimental results show two distinct absorption peaks at 2.7 and 5: 2 THz, which are in good agreement with the simulation. The absorption magnitudes at 2.7 and 5.2 THz are 0.68 and 0.74, respectively. (C) 2011 Optical Society of America

引用

页码：945 / 947

页数：3

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