超材料吸收剂
材料科学
超材料
光学
分裂环谐振器
多波段设备
摩尔吸收率
光电子学
折射率
谐振器
极化(电化学)
吸收(声学)
红外线的
消光比
沟槽(工程)
共振(粒子物理)
等离子体子
带隙
表面等离子共振
吸收带
作者
Jinlai Liu,Bingyi Liu,Shuai Tang,Jie Song,Yongyuan Jiang
摘要
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.
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