Exceptional Guided Waves
Exceptional Guided Waves
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DOI：
10.23919/ursigass51995.2021.9560546
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发表时间：
2021-08
期刊：
影响因子：
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通讯作者：
T. Mackay;Chenzhang Zhou;A. Lakhtakia
中科院分区：
文献类型：
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作者：
T. Mackay;Chenzhang Zhou;A. Lakhtakia
两个不同的伙伴介质的平面界面，其中至少一个是各向异性的，可以引导一个特殊的表面波，在一个孤立的方向传播。为了实现这一点，伙伴介质的构成参数必须满足某些约束。异常表面波的本地化特性，将它们与普通表面波区分开来：在各向异性伙伴介质中的异常表面波的衰减场表现出与界面距离的线性指数相关性，而对于普通表面波，衰减纯粹是指数的。特殊表面波的概念可以扩展到由一对平行平面界面引导的复合波。
The planar interface of two dissimilar partnering mediums, at least one of which is anisotropic, can guide an exceptional surface wave that propagates in an isolated direction. In order for this to be achieved, the constitutive parameters of the partnering mediums must satisfy certain constraints. Exceptional surface waves have localization characteristics that distinguish them from unexceptional surface waves: the decay of fields of an exceptional surface wave in an anisotropic partnering medium exhibits a combined linear-exponential dependency on distance from the interface, whereas the decay is purely exponential for an unexceptional surface wave. The notion of exceptional surface waves can be extended to compound waves that are guided by a pair of parallel planar interfaces.