Abstract
A graphene-based multi-channel THz perfect absorber is proposed in this paper. The absorber consists of a graphene layer, a Fibonacci quasi-periodic layer, a spacer, and a substrate. We demonstrate that the structure we proposed can lead to multi-channel perfect THz absorption because of the graphene surface plasmon polaritons and multiple photonic stop bands in this structure. The multi-channel working frequencies and absorption peaks can be flexibly tuned by controlling the incidence angle, size of component materials, and Fermi energy. Moreover, by adjusting the Fibonacci quasi-period orders of the structure, the number of working channels can be flexibly expanded without reoptimizing the structure size. Moreover, by adjusting the Fibonacci quasi-period orders of the structure, the number of working channels can be flexibly expanded without reoptimizing the structure size. Using existing technology, our design scheme is easy to realize, which will be helpful to promote the development and application of novel tunable optoelectronic devices.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Yongjun Xiao, Dong Zhao, Fanghua Liu, and Hao Ni
J. Opt. Soc. Am. B 40(12) 3221-3230 (2023)
Maryam Heidary Orojloo, Masoud Jabbari, Ghahraman Solooki Nejad, and Foozieh Sohrabi
Opt. Express 32(5) 8459-8472 (2024)
Shanshan Zhuo, Zhimin Liu, Fengqi Zhou, Yipeng Qin, Xin Luo, Cheng Ji, Guangxin Yang, Ruihan Yang, and Yadong Xie
Opt. Express 30(26) 47647-47658 (2022)