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arXiv 1809.08770physics.optics
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各向同性手征材料支撑的电磁表面波

On electromagnetic surface waves supported by an isotropic chiral material

James Noonan, Tom G. Mackay

摘要:

利用正则边值问题研究了各向同性手征介质中的电磁表面波。具体地,考虑了两种情况:由各向同性手性材料的平面界面引导的表面波和(a)各向同性介电材料和(b)单轴介电(或等离子体)材料。研究了等离子体和非等离子体非手性伴侣材料。在场景(a)中,激发类似于表面等离子体激元(SPP)波的表面波,而在场景(b)中,激发类似于Dyakonov波和类似于SPP波的表面波。对于数值研究,使用能够同时支持平面波的衰减和放大的各向同性手性材料,这取决于圆偏振状态。类SPP波的振幅可以被放大或衰减,这取决于场景(a)的各向同性介电伙伴材料的相对介电常数,或者取决于场景(b)的单轴介电伙伴材料相对于光轴的传播方向。

英文摘要:

Electromagnetic surface waves supported by an isotropic chiral material were investigated via the associated canonical boundary-value problem. Specifically, two scenarios were considered: surface waves guided by the planar interface of an isotropic chiral material and (a) an isotropic dielectric material and (b) a uniaxial dielectric (or plasmonic) material. Both plasmonic and non-plasmonic achiral partnering materials were investigated. In scenario (a) surface waves akin to surface-plasmon-polariton (SPP) waves were excited, while in scenario (b) surface waves akin to Dyakonov waves and akin to SPP waves were excited. For numerical studies, an isotropic chiral material capable of simultaneously supporting attenuation and amplification of plane waves, depending upon circular polarization state, was used. The amplitude of the SPP-like waves could be either amplified or attenuated, depending upon the relative permittivity of the isotropic dielectric partnering material for scenario (a), or depending upon the direction of propagation relative to the optic axis of the uniaxial dielectric partnering material for scenario (b).

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