Ultra-Wideband Terahertz Absorption Using Dielectric Circular Truncated Cones

被引：15

作者：

Ye, Longfang ^{[1
,2
,3
]}

Chen, Xin ^{[4
]}

Zeng, Fang ^{[1
,2
]}

Zhuo, Jianliang ^{[1
,2
]}

Shen, Fei ^{[5
]}

Liu, Qing Huo ^{[6
]}

机构：

[1] Xiamen Univ, Inst Electromagnet & Acoust, Xiamen 361005, Fujian, Peoples R China

[2] Xiamen Univ, Dept Elect Sci, Xiamen 361005, Fujian, Peoples R China

[3] Xiamen Univ, Shenzhen Res Inst, Shenzhen 518057, Peoples R China

[4] China Ship Dev & Design Ctr, Wuhan 430064, Hubei, Peoples R China

[5] Dongguan Univ Technol, Sch Elect Engn & Intelligentizat, Dongguan 523808, Peoples R China

[6] Duke Univ, Dept Elect & Comp Engn, Durham, NC 27708 USA

来源：

IEEE PHOTONICS JOURNAL | 2019年 / 11卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Terahertz; ultra-wideband; absorption; METAMATERIAL ABSORBER; LAYER;

D O I：

10.1109/JPHOT.2019.2934653

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：

We numerically demonstrate an ultra-wideband terahertz absorber using dielectric circular truncated cones on a non-structured graphene layer supported by a dielectric spacer on a metal reflector in the bottom. The absorber has an ultra-wideband absorption bandwidth from 0.34 to more than 10 THz with an average absorbance of 95.88% and a relative bandwidth of 186% because of the continuous multimode Fabry-Perot (FP) resonances. The absorber also possesses excellent absorption characteristics with polarization independence under normal incidence and angular stability up to 60 degrees. The proposed ultra-wideband absorber may have promising applications in terahertz trapping, imaging, and detecting.

引用

页数：7

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