论文标题
受关节空间偶性对称性保护的任意极化的散射不变性
Scattering invariance for arbitrary polarizations protected by joint spatial-duality symmetries
论文作者
论文摘要
我们揭示了如何利用联合空间 - 电磁二元性对称性来获得自我双重散射系统的不变散射特性（包括灭绝，散射，吸收），以实现任意极化的入射波。电磁二元性确保沿所有散射方向的螺旋性保存，因此本质上消除了源自入射波的圆形极化组件的两个散射通道之间的干扰。这种缺乏干扰直接确保了位于庞加莱球体相同纬度圆圈的所有极化的不变散射特性，这些极化的特征在于具有相同偏心和触觉的极化椭圆。镜像和/或反转对称性的进一步掺入将导致整个庞加莱球体的不变性，从而确保所有极化的不变散射特性。同时对不同本质的综合对称性的剥削使散射操作的自由度具有额外的自由度，为基本探索和与对称性的光 - 模具相互作用相关的光学探索和光学设备工程提供了新的见解。
We reveal how to exploit joint spatial-electromagnetic duality symmetries to obtain invariant scattering properties (including extinction, scattering, absorption) of self-dual scattering systems for incident waves of arbitrary polarizations. The electromagnetic duality ensures the helicity preservation along all scattering directions, and thus intrinsically eliminates the interferences between the two scattering channels originating from the circularly polarized components of incident waves. This absence of interference directly secures invariant scattering properties for all polarizations located on the same latitude circle of the Poincaré sphere, which are characterized by polarization ellipses of the same eccentricity and handedness. Further incorporations of mirror and/or inversion symmetries would lead to such invariance throughout the whole Poincaré sphere, guaranteeing invariant scattering properties for all polarizations. Simultaneous exploitations of composite symmetries of different natures render an extra dimension of freedom for scattering manipulations, offering new insights for both fundamental explorations and optical device engineering related to symmetry dictated light-matter interactions.
