论文标题
连续体中有约束状态授权的最大手性的元时间
Metasurfaces with maximum chirality empowered by bound states in the continuum
论文作者
论文摘要
我们证明，旋转对称性手性元张力可以通过通过连续体（BICS）中结合状态的精确形状确定的最大光学手性来支持任意尖锐的共振。从光线的一个圆形极化并与对应物相连的圆形极化，托有手性BIC共振的元表面在圆形二色性谱系中显示出狭窄的峰。我们提出了基于介电棒对这种手性BIC元面的实现，并通过数值模拟验证了最大手性的概念
We demonstrate that rotationally symmetric chiral metasurfaces can support arbitrarily sharp resonances with the maximum optical chirality determined by precise shaping of bound states in the continuum (BICs). Being uncoupled from one circular polarisation of light and resonantly coupled to its counterpart, a metasurface hosting the chiral BIC resonance exhibits a narrow peak in the circular dichroism spectrum. We propose a realization of such chiral BIC metasurfaces based on pairs of dielectric bars and validate the concept of maximum chirality by numerical simulations
