Abstract

In this paper, we present a tunable dual-band perfect metamaterial absorber working in the infrared band by integrating a metallic split-ring-groove resonator array with a liquid crystal (LC) layer atop a metal substrate. By varying the height of the central nanodisks, the absorptivity of the dual-band absorption peaks can be simultaneously adjusted. The dual-band resonance frequencies of the proposed absorber exhibit continuous tunability by adjusting the refractive index of the LC, which can be controlled by applying external voltage. The mechanism of the perfect absorption is attributed to the gap plasmonic resonance coupling regime. The presented absorber exhibits good tolerance to incidence angles up to 60° and shows polarization dependent performance, which may offer promising applications in sensing, modulator, and optical absorption switching in the infrared regime.

© 2022 Optica Publishing Group

Dual-band tunable perfect metamaterial absorber in the THz range

Gang Yao, Furi Ling, Jin Yue, Chunya Luo, Jie Ji, and Jianquan Yao
Opt. Express 24(2) 1518-1527 (2016)

Dual-band tunable perfect metamaterial absorber based on graphene

Fengling Wang, Sha Huang, Ling Li, Weidong Chen, and Zhengwei Xie
Appl. Opt. 57(24) 6916-6922 (2018)

Dynamically tunable broadband absorber/reflector based on graphene and VO₂ metamaterials

Xinyi Wang, Chi Ma, Lihua Xiao, Xia Li, Jiabin Yu, and Binggang Xiao
Appl. Opt. 61(7) 1646-1651 (2022)

Dual-band wide-angle perfect absorber based on the relative displacement of graphene nanoribbons in the mid-infrared range

Mehri Ziaee Bideskan, Amir Habibzadeh-Sharif, and Mohammad Eskandari
Opt. Express 30(20) 35698-35711 (2022)

Theoretical investigation of a five-band terahertz absorber based on an asymmetric split-ring resonator

Tianhua Meng, Dan Hu, Hongyan Wang, Xiwei Zhang, and Zhenjie Tang
Appl. Opt. 56(34) 9601-9605 (2017)