Oblique total transmissions through epsilon-near-zero metamaterials with hyperbolic dispersions
Oblique total transmissions through epsilon-near-zero metamaterials with hyperbolic dispersions
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DOI：
10.1209/0295-5075/101/44001
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发表时间：
2013-02
期刊：
影响因子：
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通讯作者：
Jie Luo;Yadong Xu;Huanyang Chen;Bo Hou;Weixin Lu;Y. Lai
中科院分区：
文献类型：
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作者：
Jie Luo;Yadong Xu;Huanyang Chen;Bo Hou;Weixin Lu;Y. Lai
具有接近于零的介电常数和/或磁导率的零折射率超材料通常由于在空气-超材料界面处发生的全反射而反射倾斜入射波。在这项工作中，我们表明，如果一个组件的近零介电常数张量的超材料从正到负，由于一个小的干扰，色散表面显着变化，从一个微小的圆形到一个双曲线，这使得斜传输。预测并观察到了一系列高阶总透射峰。这些峰是由法布里-珀罗效应引起的。我们的工作可能有潜在的应用过滤器，传感器和开关。
Zero-index metamaterials with near-zero permittivity and/or permeability usually reflect oblique incident waves due to total reflection that occurs at the air-metamaterial interface. In this work, we show that if one component of the near-zero–permittivity tensor of metamaterial turns from positive to negative due to a small disturbance, the dispersion surface changes dramatically from a tiny circle to a hyperbola, which enables oblique transmissions. A series of high-order total-transmission peaks at large incident angles is predicted and observed. These peaks are induced by Fabry-Pérot effects. Our work may have potential applications for filters, sensors and switches.