论文标题
双重性转化下非磁性颗粒的散射和吸收不变性
Scattering and absorption invariance of nonmagnetic particles under duality transformations
论文作者
论文摘要
我们通过任意支持光学诱导的磁反应的非磁性颗粒的簇来重新审视总散射（就灭绝，散射和吸收横截面而言）。我们的重新审查是从电磁二元对称性的角度进行的，据揭示了所有总散射特性在二元转换下都是不变的。这可以确保对于自偶联粒子簇，总散射特性在任何固定的入射方向上都是极化的。而对于非二重二重粒子簇，通过二元转换相互连接的两个散射构型将表现出相同的散射特性。这种电磁二元性诱导的不变性与特定的颗粒分布或波动入射方向无关，这是随机和周期簇的说明。
We revisit the total scatterings (in terms of extinction, scattering and absorption cross sections) by arbitrary clusters of nonmagnetic particles that support optically-induced magnetic responses. Our reexamination is conducted from the perspective of the electromagnetic duality symmetry, and it is revealed that all total scattering properties are invariant under duality transformations. This secures that for self-dual particle clusters, the total scattering properties are polarization independent for any fixed incident direction; while for non-self-dual particle clusters, two scattering configurations that are connected to each other through a duality transformation would exhibit identical scattering properties. This electromagnetic duality induced invariance is irrelevant to specific particle distributions or wave incident directions, which is illustrated for both random and periodic clusters.
