论文标题
在两种不同的双性培养基之间的界面处的表面波和超级klein隧道的全向激发
Omnidirectional excitation of surface waves and super-Klein tunneling at the interface between two different bi-isotropic media
论文作者
论文摘要
我们从理论上研究了表面电磁波的一些独特特征，这些特征是在两种不同类型的一般双性培养基之间的界面上激发的，其中包括特莱根培养基和手性培养基作为特殊情况。我们使用这些波的分析性分散关系，使用八种不同条件，在这种情况下它们在两个tellegen介质之间以及在两个手性介质之间生成，并且在两个手性介质之间与沿界面的波矢量的组成部分无关。这些使得在多层结构上减弱的总反射实验中，可以激发全部或广泛入射角的表面波。我们将一对匹配的一对匹配的概念概括为双性培养基，并获得了多种条件，在这些条件下，我们称之为超级klein隧道的全向总传输是通过由Tellegen介质和手性媒体组成的共轭匹配对进行的。我们发现，这些条件与表面波的全向激发密切相关。使用不变的嵌入法，我们对电磁场的吸收率，透射率和空间分布进行了广泛的数值计算，用于在双层结构上的圆形波浪，并确认结果与分析预测完全一致。
We study theoretically some unique characteristics of surface electromagnetic waves excited at the interface between two different kinds of general bi-isotropic media, which include Tellegen media and chiral media as special cases. We derive an analytical dispersion relation for those waves, using which we deduce eight different conditions under which they are generated between two Tellegen media and between two chiral media independently of the component of the wave vector along the interface. These make it possible to excite the surface waves for all or a wide range of incident angles in attenuated total reflection experiments on multilayer structures. We generalize the concept of a conjugate matched pair to bi-isotropic media and obtain several conditions under which the omnidirectional total transmission, which we call the super-Klein tunneling, occurs through conjugate matched pairs consisting of Tellegen media and of chiral media. We find that these conditions are closely linked to those for the omnidirectional excitation of surface waves. Using the invariant imbedding method, we perform extensive numerical calculations of the absorptance, the transmittance, and the spatial distribution of the electromagnetic fields for circularly-polarized waves incident on bilayer structures and confirm that the results agree perfectly with the analytical predictions.
