This article aims at studying the angular scattering properties of bianisotropic metasurfaces and clarifying the different roles played by tangential and normal polarization densities. Different types of metasurfaces are considered for this study and are classified according to their symmetrical/asymmetrical and reciprocal/nonreciprocal angular scattering behavior. Finally, the article presents the relationships between the symmetrical angular scattering properties of reciprocal metasurfaces and the structural symmetries of their scattering particles. This may prove to be practically useful for the implementation of metasurfaces with complex angular scattering characteristics.

中文翻译：

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超表面的角散射特性

本文旨在研究双各向异性超表面的角散射特性，并阐明切向和法向偏振密度所起的不同作用。本研究考虑了不同类型的超表面，并根据它们的对称/不对称和互易/非互易角散射行为进行分类。最后，文章介绍了互易超表面的对称角散射特性与其散射粒子的结构对称性之间的关系。这可能被证明对于具有复杂角散射特性的超表面的实现非常有用。