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Dual‐Wavelength Carpet Cloak Using Ultrathin Metasurface
Author(s) -
Yang Jianing,
Huang Cheng,
Wu Xiaoyu,
Sun Bo,
Luo Xiangang
Publication year - 2018
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201800073
Subject(s) - cloak , cloaking , optics , metamaterial , wavefront , terahertz radiation , wavelength , materials science , scattering , microwave , bandwidth (computing) , polarization (electrochemistry) , optoelectronics , broadband , physics , computer science , telecommunications , chemistry , quantum mechanics
Ultrathin metasurfaces pave an encouraging way for invisibility carpet cloaks on account of their excellent electromagnetic wavefront manipulation. However, the current metasurface‐based carpet cloaks operate at only one wavelength and are limited by their narrow bandwidth. Here, a dual‐wavelength carpet cloak using a two‐layer metasurface at the microwave frequencies is proposed. By individual design of phase compensation at each layer of the metasurface, the proposed cloak can restore the scattering behaviors of a flat conducting plane at different frequencies. Both simulation and experimental results demonstrate that the cloaking effects are realized at 6.1 and 10.2 GHz. In addition, it is found that the cloak is polarization‐insensitive at above two frequencies. The proposed design can be also scaled to the terahertz and optical domain.