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首页> 外文期刊>Journal of Experimental and Theoretical Physics >Electromagnetic waves in uniaxial crystals with metallized boundaries: Mode conversion, pure reflections, and bulk polaritons
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Electromagnetic waves in uniaxial crystals with metallized boundaries: Mode conversion, pure reflections, and bulk polaritons

机译:具有金属化边界的单轴晶体中的电磁波:模式转换,纯反射和体极化子

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摘要

A theory is constructed for the reflection of plane electromagnetic waves in uniaxial crystals with a positive definite permittivity tensor and an arbitrarily oriented metallized boundary. The problem is solved both for general-position orientations corresponding to three-partial reflection and for special conditions allowing two-partial reflections: mode conversions when the incident and reflected waves belong to different sheets of the refraction surface and "pure" reflections when both waves belong to the same sheet. The space of pure reflections is shown to be formed by two types of optical-axis orientations: arbitrary directions in the plane of the crystal surface and in the plane of incidence. The configurations of the conversion surface for optically positive and negative crystals are investigated. A subspace of pure reflections that transform into one-partial bulk polaritons with the energy flux parallel to the surface at grazing incidence has been found. The domain of existence of such bulk eigenmodes is bounded by two "lines" of solutions. These are any directions along the boundary containing the optical axis for ordinary polaritons and the direction along the projection of the optical axis onto the surface at an arbitrary orientation of the axis with respect to the boundary for extraordinary polaritons.
机译:构造了一种理论,用于在具有正定介电常数张量和任意取向的金属化边界的单轴晶体中反射平面电磁波。对于对应于三部分反射的一般位置方向以及允许两部分反射的特殊条件,该问题都得到了解决:当入射波和反射波属于折射表面的不同片时进行模转换,而当两个波均反射时则进行“纯”反射属于同一张纸。示出纯反射的空间由两种类型的光轴取向形成:在晶体表面的平面中和在入射平面中的任意方向。研究了用于光学正晶体和负晶体的转换表面的构型。发现了一个纯反射的子空间,该子空间在掠入射时转换为具有平行于表面的能量通量的部分体极化子。这种体质本征模的存在域受到解的两条“线”的限制。这些是对于普通极化子而言,是沿着包含光轴的边界的任何方向,对于异常极化子而言,是沿着相对于边界的光轴在轴的任意取向上的投影到表面的方向。

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