Magnetically Tunable Graphene-Based Terahertz Metasurface

Frontiers in Physics

Chen Wang¹  Shiqiang Zhao¹  Yongzheng Wen¹  Yafeng Lu² 

[1] Beijing, China;Beijing, China;Beijing, China;

关键词: graphene;    magnetostatic field;    dynamically tunable;    terahertz metasurface;    Lorentz force;   

DOI  :  10.3389/fphy.2020.622839

来源: Frontiers

【 摘 要 】

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.

【 授权许可】

CC BY