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Proceedings Paper

Tunable dual-band absorber based on hybrid graphene metamaterial in terahertz frequencies
Author(s): Xin Yan; Lan-Ju Liang; Zhang Zhang; Xin Ding; Jian-Quan Yao Sr.
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Paper Abstract

Two kinds of terahertz (THz) tunable absorber based on boottom-continuous graphene sheet and top-periodic grFeraphene structure were proposed and characterized. For the first absorber of continuous graphene sheet as a metal ground plate, it has two absorption peaks locating at 1.03 THz and 2.60THz under the Fermi energy of 0.8 eV. Upon varying Fermi energy of graphene layer from 0.4 eV to 1.0 eV, the two absorption peaks can be dynamically controlled and the modulation depth approached 19.7 % and 12.6%, respectively. For the second absorber of the periodic graphene structure, the two absorption peaks are shifted from 0.90 THz to 1.03 THz and 2.24 THz to 2.79 THz with increasing Fermi energy of graphene from 0.3 eV to 1.0 eV, respectively. The according modulation depth of two absorption peaks reached 16.23 % and 19.78 %. The absorption magnitude of peaks can both stay above 95% under different Fermi energy for two kinds of THz absorber. These results show that hybrid graphene metamaterial exhibited potentials to achieve high-performance tunable THz absorber, and may offer widespread applications such as biological detection and imaging.

Paper Details

Date Published: 24 October 2017
PDF: 7 pages
Proc. SPIE 10460, AOPC 2017: Optoelectronics and Micro/Nano-Optics, 104600T (24 October 2017); doi: 10.1117/12.2284260
Show Author Affiliations
Xin Yan, Tianjin Univ. (China)
Zaozhuang Univ. (China)
Lan-Ju Liang, Tianjin Univ. (China)
Zaozhuang Univ. (China)
Zhang Zhang, Tianjin Univ. (China)
Xin Ding, Tianjin Univ. (China)
Jian-Quan Yao Sr., Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 10460:
AOPC 2017: Optoelectronics and Micro/Nano-Optics
Min Qiu; Min Gu; Xiaocong Yuan; Zhiping Zhou, Editor(s)

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