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

Fengling Wang; Sha Huang; Ling Li; Weidong Chen; Zhengwei Xie

doi:10.1117/12.2507515

24 January 2019 A wide-angle and polarization-insensitive tunable metamaterial absorber based on graphene

Fengling Wang, Sha Huang, Ling Li, Weidong Chen, Zhengwei Xie

Proceedings Volume 10840, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics; 108400I (2019) https://doi.org/10.1117/12.2507515
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

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.

Citation Download Citation

Fengling Wang, Sha Huang, Ling Li, Weidong Chen, and Zhengwei Xie "A wide-angle and polarization-insensitive tunable metamaterial absorber based on graphene", 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); https://doi.org/10.1117/12.2507515

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KEYWORDS

Absorption

Graphene

Polarization

Metamaterials

Dielectrics

Tunable metamaterials

Metals

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