Ghost surface phononic polaritons in ionic-crystal metamaterial
Ghost surface phononic polaritons in ionic-crystal metamaterial
复制标题
离子晶体超材料中的鬼表面声子极化子
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Xuan
中科院分区：
文献类型：
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作者：
Sheng Zhou;Qiang Zhang;S. Fu;Xuan
E. Narimanov 最近预测了各向异性透明材料中的幽灵电磁波。在本文中，预测了层状离子晶体超材料（ICMM）的单个斜表面上的三个鬼表面声子极化子（GSPhP）。它们沿着表面传播，但它们在 ICMM 中的电磁场会随着距表面的距离而呈正弦振荡并呈指数衰减。这三个 GSPhP 的性质互不相同。在ICMM的有效金属区和双曲区的边界上发现了一个额外的独特的GSPhP，其特点如下：（1）其能量只能在ICMM外传导； (2)其波矢和电场具有与材料光轴垂直的相同方向。讨论了 GSPhP 存在的条件。数值结果是基于ZnS/SiO2 超材料获得的。
Ghost electromagnetic waves were recently predicted in anisotropic transparent materials by E. Narimanov. In this paper, three ghost surface phonon polaritons (GSPhPs) are predicted at the single oblique surface of layered ionic-crystal metamaterial (ICMM). They propagate along the surface, but their electromagnetic fields in the ICMM sinusoidally oscillate and exponentially attenuate with the distance from the surface. The three GSPhPs are mutually different in character. An additional unique GSPhP is found on the boundary between the effective metal and hyperbolic regions of the ICMM, and its characteristics are as follows: (1) its energy can only conduct outside the ICMM; (2) its wave vector and electric field possess the same direction transverse to the material optical axis. The conditions for the existence of the GSPhPs are discussed. The numerical results were obtained based on ZnS/SiO2 metamaterials.