1College of Physics, Optoelectronics and Energy Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University, Suzhou 215006, China 2State Key Laboratory of Surface Physics Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) Department of Physics, Fudan University, Shanghai, China 3Shanghai 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.
Chu, H.; Li, Q.; Liu, B.; Luo, J.; Hang, Z.; Sun, S.; Zhou, L.; Lai, Y. Transmission cloaking by metasurfaces and index-near-zero materials, in Proceedings of the 7th International Multidisciplinary Conference on Optofluidics 2017, Singapore, 25–28 July 2017, MDPI: Basel, Switzerland, doi:10.3390/optofluidics2017-04368
