A metamaterial absorber for the terahertz regime: Design, fabrication and characterization

被引：1293

作者：

Tao, Hu ^{[1
]}

Landy, Nathan I. ^{[2
]}

Bingham, Christopher M. ^{[2
]}

Zhang, Xin ^{[1
]}

Averitt, Richard D. ^{[3
]}

Padilla, Willie J. ^{[2
]}

机构：

[1] Boston Univ, Dept Mfg Engn, 15 St Marys St, Brookline, MA 02446 USA

[2] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA

[3] Boston Univ, Dept Phys, Boston, MA 02215 USA

来源：

OPTICS EXPRESS | 2008年 / 16卷 / 10期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1364/OE.16.007181

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a metamaterial that acts as a strongly resonant absorber at terahertz frequencies. Our design consists of a bilayer unit cell which allows for maximization of the absorption through independent tuning of the electrical permittivity and magnetic permeability. An experimental absorptivity of 70% at 1.3 terahertz is demonstrated. We utilize only a single unit cell in the propagation direction, thus achieving an absorption coefficient alpha = 2000 cm(-1). These metamaterials are promising candidates as absorbing elements for thermally based THz imaging, due to their relatively low volume, low density, and narrow band response. (C) 2008 Optical Society of America.

引用

页码：7181 / 7188

页数：8

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