光学
手性(物理)
圆极化
摩尔吸收率
吸收(声学)
材料科学
圆二色性
旋转(数学)
磁圆二色性
旋光
旋转对称性
物理
雷
对称(几何)
X射线磁圆二色性
光电子学
对称性破坏
谱线
化学
自发对称破缺
天文
量子力学
微带线
机械
数学
Nambu–Jona Lasinio模型
结晶学
几何学
作者
Zhe Shen,Dingxin Huang,Xiaojun Lin
出处
期刊:Optics Express
[The Optical Society]
日期:2023-10-10
卷期号:31 (22): 35730-35730
摘要
In this work, we proposed a state-of-the-art metasurface model that breaks the mirror symmetry and rotation symmetry of the structure. It consists of two-layer rotating gold split rings, and has the capability of chirality-selective absorption for circularly polarized light (CPL) in two bands. The absorption peaks for left- and right- circularly polarized (LCP&RCP) light appeared at 989 nm and 1404 nm, respectively, with the maximum absorptivity of 98.5% and 96.3%, respectively. By changing the rotation angle of the two-layer gold split rings, it could also be designed as a single-band chiral metasurface absorber, which only absorbed RCP light but not LCP light, and the absorptivity of RCP light could be up to 97.4%. Furthermore, we found our designed absorbers had the characteristics of great circular dichroism (CD) and symmetric absorption. The physical mechanism of the selective absorption of CPL by the absorbers may be explained by the current vector analysis. In addition, the absorption peak could be tuned with the changing of the geometrical parameters of the structure. The proposed chirality-selective metasurface absorbers could be used in CD spectral detection, optical communication, optical filtering, and other fields.
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