A polarization-independent and ultra-broadband terahertz metamaterial absorber studied based on circular-truncated cone structure

被引：8

作者：

Mo Man-Man ^{[1
]}

Wen Qi-Ye ^{[1
]}

Chen Zhi ^{[2
]}

Yang Qing-Hui ^{[1
]}

Li Sheng ^{[1
]}

Jing Yu-Lan ^{[1
]}

Zhang Huai-Wu ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, State Key Lab Elect Films & Integrated Devices, Chengdu 610054, Peoples R China

[2] Univ Elect Sci & Technol China, Natl Key Lab Sci & Technol Commun, Chengdu 610054, Peoples R China

来源：

ACTA PHYSICA SINICA | 2013年 / 62卷 / 23期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

terahertz wave; metamaterials absorber; circular truncated cone; ultra-broadband; ABSORPTION; MULTIBAND;

D O I：

10.7498/aps.62.237801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper, we present an ultra-broadband polarization-independent terahertz (THz) metamaterial absorber (MA) made of circular truncated cone metamaterial. Absorptivity higher than 92.3% at normal incidence is obtained in a wide range of frequencies from 2 to 10 THz. We employ an isotropic metamaterial cell which consists of alternating layers of Au metal and SiO2 dielectric spacer. The absorption spectra of the THz MA are calculated using the finite-difference time domain (FDTD) method within the CST Microwave Studio 2009 in the frequency range of 0-10 THz. Our broadband absorber can be regarded as a group of micro-absorbers perpendicularly stacked and their absorption peaks coupling to each other to form an ultra broadband absorption. This THz MA has the advantages of broadband, polarization-independent and fabrication facility, and thus can be widely applied in THz wave harvesting, detection, spectrum imaging and stealthy technology.

引用

页数：7

共 27 条

[1] Wide-angle infrared absorber based on a negative-index plasmonic metamaterial [J].