This paper analyzes the existence of surface electromagnetic waves (SEWs) at the interface of bianisotropic bicrystals which are formed of half-infinite periodic superlattices or of homogeneous bianisotropic media. In either case we assume no absorption. Properties of the impedance matrices characterizing such bianisotropic media are established. On this basis, a series of statements is proved on the maximum total number of SEWs in two bicrystals composed of two superlattices or homogeneous media in such a way that the upper (lower) half of one bicrystal complements the lower (upper) part of the other to an infinite periodic superlattice or homogeneous media, respectively. It is shown that in superlattices the maximum number of SEWs at a fixed tangential wave number equals two in the lowest forbidden band (this band begins from zero frequency) and four in any upper forbidden band. It is also proved that at most two SEWs emerge in homogeneous bianisotropic media.

中文翻译：

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各向异性超晶格和均质介质中的表面电磁波

本文分析了由半无限周期超晶格或均质各向异性介质形成的各向异性双晶界面处的表面电磁波（SEW）的存在。无论哪种情况，我们都假定没有吸收。建立了表征这种各向异性介质的阻抗矩阵的属性。在此基础上，证明了由两个超晶格或均质介质组成的两个双晶中SEW的最大总数的一系列陈述，使得一个双晶的上半部（下半部）与该双晶中的下半部（上半部）互补。分别对应于无限周期超晶格或齐次介质。结果表明，在超晶格中，固定切线波数下的SEW的最大数量等于最低禁止频带（此频带从零频率开始）中的两个，以及任何较高禁止频带中的四个。还证明了在均匀的双各向异性介质中最多出现两个SEW。