Theoretical Investigation of Broadband and Wide-Angle Terahertz Metamaterial Absorber

被引：170

作者：

Wang, Ben-Xin ^{[1
,2
]}

Wang, Ling-Ling ^{[1
,2
]}

Wang, Gui-Zhen ^{[1
,2
]}

Huang, Wei-Qing ^{[1
,2
]}

Li, Xiao-Fei ^{[1
,2
]}

Zhai, Xiang ^{[1
,2
]}

机构：

[1] Hunan Univ, Sch Phys & Microelect, Changsha 410082, Hunan, Peoples R China

[2] Hunan Univ, Key Lab Micronano Phys & Technol Hunan Prov, Changsha 410082, Hunan, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2014年 / 26卷 / 02期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

Bandwidth; metamaterial; perfect absorber; resonance frequencies; ABSORPTION;

D O I：

10.1109/LPT.2013.2289299

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Broadband absorbers have attracted considerable attention due to their great prospect for practical applications. The mechanism is usually a superposition of several sets of structures with different geometrical dimensions. Herein, we numerically investigate an unconventional to existing metamaterial-based broadband terahertz absorber based on the multilayer same-sized square plate structure. Greater than 99% absorption across a frequency range of 300 GHz with the central frequency similar to 1.96 THz can be obtained. The FWHM of this device can be up to 42% (with respect to the central frequency), which is 2.6 times greater than that of the single layer structure. Such a property is retained well at a very wide range of incident angles. The mechanism of the broadband absorber is attributed to longitudinal coupling between layers. The results of the designed metamaterial absorber appear to be very promising for solar cell, detection, and imaging applications.

引用

页码：111 / 114

页数：4

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