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Magnetically Tunable Graphene-Based Terahertz Metasurface
Frontiers in Physics ( IF 3.1 ) Pub Date : 2020-12-22 , DOI: 10.3389/fphy.2020.622839
Yafeng Lu , Chen Wang , Shiqiang Zhao , Yongzheng Wen

Graphene is a promising platform for configurable terahertz (THz) devices due to its reconfigurability, but most researches focus on its electrical tunability. Here, we propose a graphene-based THz metasurface comprised of graphene cut-wire arrays for magnetic manipulation of the THz wave. With the external magnetostatic field applied, the resonant currents of the graphene cut-wire can be effectively affected by the Lorentz force, leading to an evident tuning of the response of the metasurface. The simulated results fully demonstrate that the resonance frequencies of the graphene THz metasurface can be efficiently modulated under a vertical magnetostatic field bias, resulting in the manipulation of the transmittance and phase of the THz wave. As a new method of the tunable THz metasurface, our structure shows promising applications in the THz regime, including the ultracompact THz modulators and magnetic field sensors.



中文翻译:

磁性可调石墨烯基太赫兹超表面

石墨烯由于其可重构性而成为可配置太赫兹(THz)器件的有前途的平台,但是大多数研究集中在其电可调性上。在这里,我们提出了一个基于石墨烯的太赫兹超颖表面,该表面由石墨烯切割线阵列组成,用于磁化太赫兹波。在施加外部静磁场的情况下,洛伦兹力可以有效地影响石墨烯切割线的共振电流,从而导致超表面响应的明显调整。仿真结果充分表明,在垂直静磁场偏置下,可以有效地调制石墨烯THz超表面的共振频率,从而可以控制THz波的透射率和相位。作为可调THz超表面的一种新方法,

更新日期:2021-01-25
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