Negative refraction based on purely imaginary metamaterials

被引：0
|
作者：
Yang-Yang Fu
Ya-Dong Xu
Huan-Yang Chen
机构：
[1] Xiamen University,Institute of Electromagnetics and Acoustics and Department of Electronic Science
[2] Soochow University,College of Physics, Optoelectronics and Energy
来源：
Frontiers of Physics | 2018年 / 13卷
关键词：
negative refraction; coherent perfect absorber; laser; purely imaginary metamaterials;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
By introducing a new mechanism based on purely imaginary metamaterials (PIMs), we reveal that bidirectional negative refraction and planar focusing can be obtained using a pair of PIM slabs, overcoming the unidirectional limit in parity-time (PT)-symmetric systems. Compared with PT-symmetric systems, which require two different types of materials, the proposed negative refraction can be realized using two identical media. In addition, asymmetric excitation with bidirectional total transmission is observed in our PIM system. Therefore, a new way to realize negative refraction with properties that are unavailable in PT-symmetric systems is presented.
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