Total Transmission and Total Reflection by Zero Index Metamaterials with Defects
Total Transmission and Total Reflection by Zero Index Metamaterials with Defects
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DOI：
10.1103/physrevlett.105.233908
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发表时间：
2010-12-03
影响因子：
8.6
通讯作者：
Klaus, Halterman
中科院分区：
文献类型：
--
作者：
Viet Cuong Nguyen;Chen, Lang;Klaus, Halterman
我们从理论上研究了通过带有介电缺陷的零折射率超材料的微波传输。超材料与自由空间阻抗匹配，介电常数和磁导率在给定频率范围内趋向于零。通过简单地改变缺陷的半径和介电常数，就可以实现撞击电磁波的全透射或全反射。所提出的缺陷结构可以在不限制物体视角的情况下提供屏蔽或隐形技术的进步。通过结合可调谐折射率材料（例如液晶和 BaSrTiO(3)），可以主动控制观察到的奇异透射和反射特征。
We theoretically investigate microwave transmission through a zero-index metamaterial loaded with dielectric defects. The metamaterial is impedance matched to free space, with the permittivity and permeability tending towards zero over a given frequency range. By simply varying the radii and permittivities of the defects, total transmission or reflection of the impinging electromagnetic wave can be achieved. The proposed defect structure can offer advances in shielding or cloaking technologies without restricting the object's viewpoint. Active control of the observed exotic transmission and reflection signatures can occur by incorporating tunable refractive index materials such as liquid crystals and BaSrTiO(3).