Simultaneous switching at multiple frequencies and triple plasmon-induced transparency in multilayer patterned graphene-based terahertz metamaterial

被引:88
作者
Liu, Zhimin [1 ,2 ]
Zhang, Xiao [1 ]
Zhang, Zhenbin [1 ]
Gao, Enduo [1 ]
Zhou, Fengqi [1 ]
Li, Hongjian [3 ]
Luo, Xin [1 ]
机构
[1] East China Jiaotong Univ, Sch Sci, Nanchang 330013, Jiangxi, Peoples R China
[2] Ohio State Univ, Dept Mat Sci & Engn, 2041 Coll Rd, Columbus, OH 43210 USA
[3] Cent South Univ, Sch Phys & Elect, Changsha 499783, Hunan, Peoples R China
基金
中国国家自然科学基金;
关键词
terahertz; triple-PIT; multilayer patterned graphene metamaterial; optical switch; ABSORPTION;
D O I
10.1088/1367-2630/ab9e8a
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A novel multilayer terahertz metamaterial composed of double rectangle, vertical single rectangle, vertical double rectangle and single rectangle graphene layer is proposed. The dynamic adjustable triple plasmon induced transparency (PIT) is realized by coupling two bright modes and two dark modes, which is an especial synergy effect between two single-PIT. Coupled mode theory contained four resonators is employed to explain the triple-PIT, and the theoretical results exhibit excellent consistency with finite-difference time-domain. Surprisingly, the triple-PIT can evolve into a dual-PIT or a single-PIT only by changing the Fermi level of graphene, and the amplitude modulation degrees at the four resonance frequencies of the triple-PIT are 74.7%, 87.8%, 76.5%, and 77.7%, respectively. In addition, a simultaneous switching at multiple frequencies is realized by adjusting different Fermi levels. Therefore, this study not only lays the foundation for explaining phenomenon of the triple-PIT but also puts forward new ideas for the design of optoelectronic device.
引用
收藏
页数:10
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