圆二色性
超材料
材料科学
手性(物理)
振动圆二色性
二色性
线性二色性
X射线磁圆二色性
光学
共振(粒子物理)
极化(电化学)
双层
圆极化
光子晶体
光电子学
折射率
物理
磁圆二色性
结晶学
谱线
化学
原子物理学
对称性破坏
微带线
天文
量子力学
手征对称破缺
Nambu–Jona Lasinio模型
作者
Pengtao Lai,Guohua Dong,Wei Wang,Tao Chen,Tingting Lv,Bo Lv,Zheng H. Zhu,Yuxiang Li,Chunying Guan,Jinhui Shi
出处
期刊:Optics Express
[The Optical Society]
日期:2020-05-04
卷期号:28 (10): 15071-15071
被引量:11
摘要
Intrinsic and extrinsic chiral responses have been widely investigated in metamaterials, however the relationship between them has been seldom discussed. We numerically and experimentally demonstrate angle enhanced chiral dichroism and study the separation between intrinsic and extrinsic chiral responses in metamaterial with asymmetrically split aperture dimers. The metamaterial exhibits triple-band resonant circular dichroism at normal incidence. The oblique incidence leads to giant enhancement of circular dichroism at two low-frequency resonances while yields an obvious resonance split of the circular dichroism in the vicinity of the high-frequency resonance. The whole circular dichroism response results from the balance between intrinsic and extrinsic chirality and the circular dichroism spectra at positive and negative angles of incidence exhibit an asymmetry due to the existence of intrinsic chirality. Importantly, the intrinsic chirality in the metamaterial may be individually investigated since extrinsic chiral response may be removed from the total circular dichroism by superimposing two circular dichroism spectra at positive and negative incident angles. The metamaterial will be promising to achieve enhanced chiral response and also separately utilize intrinsic and extrinsic chirality for manipulating the polarization state of light.
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