Dual plasmonically induced transparency and ultra-slow light effect in m-shaped graphene-based terahertz metasurfaces
Dual plasmonically induced transparency and ultra-slow light effect in m-shaped graphene-based terahertz metasurfaces
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DOI：
10.7567/1882-0786/ab5602
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发表时间：
2019-11
影响因子：
2.3
通讯作者：
Enduo Gao;Zhimin Liu;Hongjian Li;Hui Xu;Zhenbin Zhang;Xiao Zhang;Xin Luo;Fengqi Zhou
中科院分区：
文献类型：
--
作者：
Enduo Gao;Zhimin Liu;Hongjian Li;Hui Xu;Zhenbin Zhang;Xiao Zhang;Xin Luo;Fengqi Zhou
提出了一种m型石墨烯基超颖表面，通过耦合一个暗模和两个亮模产生双重动态可调的等离子体诱导透明。数值结果与理论结果具有显著的一致性。结果表明，当石墨烯的费米能级较低时，石墨烯表现出有损耗的介电性质;反之，石墨烯表现出金属性质。此外，群延迟可以高达0.6 ps，展示了超慢光效应。该研究为太赫兹波段多通道超慢光和调制器件的设计提供了指导。
An m-shaped graphene-based metasurface is proposed, which can produce a dual dynamically tunable plasmonically induced transparency by coupling among a dark mode and two bright modes. The numerical and theoretical results exhibit prominent consistency. The result shows that when the Fermi level of graphene is low, the graphene exhibits lossy dielectric; conversely, it has metallic properties. Moreover, the group delay can be as high as 0.6 ps demonstrating the ultra-slow light effects. Thus, this study provides guidance for the design of multi-channel ultra-slow light and modulation devices in the terahertz range.