太赫兹辐射
谐振器
光学
物理
吸收(声学)
耦合模理论
光子学
分裂环谐振器
太赫兹光谱与技术
束缚态
极化(电化学)
光电子学
量子力学
折射率
物理化学
化学
作者
Zhonglei Shen,Xiangdong Fang,Shengnan Li,Wei Yin,Liuyang Zhang,Xuefeng Chen
出处
期刊:Optics Letters
[Optica Publishing Group]
日期:2021-12-02
卷期号:47 (3): 505-505
被引量:39
摘要
Spin-selective absorption is broadly applicable to numerous photonic devices. Here, based on a stereoscopic full metallic resonator array, a terahertz chiral metasurface with a single-layer structure is proposed and numerically demonstrated. By employing the coupled-mode theory, we demonstrate that the chiral metasurface can near-perfectly absorb one circularly polarized wave in the quasi-bound states in the continuum-induced critical coupling region but non-resonantly reflect its counterparts. Interestingly, the linewidths and handedness of the proposed chiral metasurface can be flexibly controlled by an in-plane symmetry perturbation. Our designs might offer an alternative strategy to develop chiral metasurfaces apart from conventional methods and might stimulate many potential applications for emerging terahertz technologies.
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