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Transmission cloaking by metasurfaces and index-near-zero materials
1 , 2 , 1 , 1 , * 1 , * 3 , 2 , * 1
1  College of Physics, Optoelectronics and Energy Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University, Suzhou 215006, China
2  State Key Laboratory of Surface Physics Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) Department of Physics, Fudan University, Shanghai, China
3  Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Green Photonics Department of Optical Science and Engineering, Fudan University, Shanghai, China


Metasurfaces have been successfully applied to realize cloaking in the reflection geometry recently[1, 2]. We propose a transmission cloaking scheme by using a cloaking shell consisting of a metasurface and a thin layer of zero-index medium. The metasurface is designed to impose a suitable amount of phase change on the incident waves and radiation waves, so as to avoid the total reflection on the surface of zero-index medium and to restore the propagating wave front. The energy flux is tunneled through the zero-index medium. Full-wave simulation results show good cloaking effects for cloaks of almost arbitrary shapes. We design and fabricate a rhombus cloaking shell for operation in the microwave region and the experimental results agree well with the numerical simulations.


Keywords: cloaking metasurfaces