期刊
OPTICS EXPRESS
卷 25, 期 14, 页码 15635-15642出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.25.015635
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资金
- National Key Basic Research Special Foundation of China [2014CB339800]
- National Natural Science Foundation of China [61622505, 61575141, 61420106006, 61605143, 61422509]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13033]
- U.S. National Science Foundation [ECCS-1232081]
Ultrathin metasurfaces with local phase compensation deliver new schemes to cloaking devices. Here, a large-scale carpet cloak consisting of an ultrathin metasurface is demonstrated numerically and experimentally in the terahertz regime. The proposed carpet cloak is designed based on discontinuous-phase metallic resonators fabricated on a polyimide substrate, offering a wide range of reflection phase variations and an excellent wavefront manipulation along the edges of the bump. The invisibility is verified when the cloak is placed on a reflecting triangular surface (bump). The multi-step discrete phase design method would greatly simplify the design process and is probable to achieve large-dimension cloaks, for applications in radar and antenna systems as a thin, lightweight, and easy-to-fabricate solution for radio and terahertz frequencies. (C) 2017 Optical Society of America
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