Negative refraction based on purely imaginary metamaterials |
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| Authors: | Yang-Yang Fu Ya-Dong Xu Huan-Yang Chen |
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| Institution: | 1. Institute of Electromagnetics and Acoustics and Department of Electronic Science, Xiamen University, Xiamen 361005, China2. College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, China |
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| Abstract: | 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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| Keywords: | negative refraction coherent perfect absorber laser purely imaginary metamaterials |
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