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A wide-angle and polarization-insensitive tunable metamaterial absorber based on graphene
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Paper Abstract

In this paper, we propose a frequency tunable metamaterial perfect absorber in the THz region based on graphene. The unit cell consists of a periodically patterned graphene cross-ring resonator and a gold film separated by a dielectric spacer. The simulation results demonstrate that the maximum value of absorption is 99.9% at 4.7 THz. By controlling the graphene conductivity, the frequency tunable characteristics can be achieved in this metamaterial absorber. When varying the diameter of the ring or the length of the cross, we find that resonance absorption frequency will significantly shifts. Moreover, the metamaterial absorber possesses the polarization-insensitive and a wide range of the incident angles up to 70° for both TE and TM polarization. Our absorber can be used in some practical applications due to its excellent absorption and simple structure.

Paper Details

Date Published: 24 January 2019
PDF: 9 pages
Proc. SPIE 10840, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics, 108400I (24 January 2019); doi: 10.1117/12.2507515
Show Author Affiliations
Fengling Wang, Sichuan Normal Univ. (China)
Sha Huang, Sichuan Normal Univ. (China)
Ling Li, Sichuan Normal Univ. (China)
Weidong Chen, Sichuan Normal Univ. (China)
Zhengwei Xie, Sichuan Normal Univ. (China)


Published in SPIE Proceedings Vol. 10840:
9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
Mingbo Pu; Xiong Li; Bin Fan; Min Gu; Reinhart Poprawe; Xiangang Luo, Editor(s)

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