Broadband and wide-angle terahertz carpet cloaks based on pattered graphene metasurfaces

被引：21
作者：
Lv, Chuang [1 ]
Ding, Pei [1 ,2 ]
Tian, Ximin [1 ,2 ]
Li, Yan [1 ,2 ]
Shao, Li [1 ,2 ]
Zeng, Fanguang [1 ,2 ]
Wang, Junqiao [3 ]
机构：
[1] Zhengzhou Univ Aeronaut, Sch Mat Sci & Engn, Zhengzhou 450046, Peoples R China
[2] Zhengzhou Univ Aeronaut, Henan Key Lab Aeronaut Mat & Applicat Technol, Zhengzhou 450046, Peoples R China
[3] Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450052, Peoples R China
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2020年 / 53卷 / 15期
基金：
中国国家自然科学基金;
关键词：
graphene; metasurface; carpet cloak; dispersion; terahertz; METAMATERIALS; RESONANCES;
D O I：
10.1088/1361-6463/ab6d1d
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Conventional metasurface carpet cloak generally has a narrow working bandwidth and a small incident angle range, which is far from meeting the requirements of modern military for broadband and wide-angle cloaking. Based on graphene apertures and graphene patches, we propose the design of metasurface carpet cloaks for terahertz wave and explore their application potential in realizing broadband and wide-angle cloaking. Simulation results demonstrate that the carpet cloaks based on graphene apertures and patches can achieve a large working bandwidth of 35.7% and 52.6%, and a wide angular span of +/- 30 degrees and +/- 40 degrees, respectively. The cloaking performance and the working bandwidths of the two graphene metasurface carpet cloaks can be tuned by changing the graphene Fermi energy uniformly. The carpet cloak constructed by graphene patches has a larger bandwidth and a wider angle domain than that by graphene apertures, which can be understood by comparing the phase dispersion of the two graphene metasurfaces.
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页数：9
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