Polarization insensitive, broadband terahertz metamaterial absorber

被引：396

作者：

Grant, James ^{[1
]}

Ma, Yong ^{[1
]}

Saha, Shimul ^{[1
]}

Khalid, Ata ^{[1
]}

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

机构：

[1] Univ Glasgow, Sch Engn, Glasgow G12 8LT, Lanark, Scotland

来源：

OPTICS LETTERS | 2011年 / 36卷 / 17期

关键词：

INDEX; REGIME;

D O I：

10.1364/OL.36.003476

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present the simulation, implementation, and measurement of a polarization insensitive broadband resonant terahertz metamaterial absorber. By stacking metal-insulator layers with differing structural dimensions, three closely positioned resonant peaks are merged into one broadband absorption spectrum. Greater than 60% absorption is obtained across a frequency range of 1: 86 THz where the central resonance frequency is 5 THz. The FWHM of the device is 48%, which is two and half times greater than the FWHM of a single layer structure. Such metamaterials are promising candidates as absorbing elements for bolometric terahertz imaging. (C) 2011 Optical Society of America

引用

页码：3476 / 3478

页数：3

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