Ultra-Wideband Terahertz Absorption Using Dielectric Circular Truncated Cones

Longfang Ye; Xin Chen; Fang Zeng; Jianliang Zhuo; Fei Shen; Qing Huo Liu

doi:10.1109/JPHOT.2019.2934653

IEEE Photonics Journal (Jan 2019)

Ultra-Wideband Terahertz Absorption Using Dielectric Circular Truncated Cones

Longfang Ye,
Xin Chen,
Fang Zeng,
Jianliang Zhuo,
Fei Shen,
Qing Huo Liu

Affiliations

Longfang Ye: ORCiD; Institute of Electromagnetics and Acoustics, and Department of Electronic Science, Xiamen University, Xiamen, China
Xin Chen: China Ship Development and Design Center, Wuhan, China
Fang Zeng: Institute of Electromagnetics and Acoustics, and Department of Electronic Science, Xiamen University, Xiamen, China
Jianliang Zhuo: Institute of Electromagnetics and Acoustics, and Department of Electronic Science, Xiamen University, Xiamen, China
Fei Shen: School of Electrical Engineering & Intelligentization, Dongguan University of Technology, Dongguan, China
Qing Huo Liu: ORCiD; Department of Electrical and Computer Engineering, Duke University, Durham, NC, USA

DOI: https://doi.org/10.1109/JPHOT.2019.2934653
Journal volume & issue: Vol. 11, no. 5
pp. 1 – 7

Abstract

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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°. The proposed ultra-wideband absorber may have promising applications in terahertz trapping, imaging, and detecting.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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