• 文献标题:   Controllable multi-mode absorption in terahertz absorber with graphene-dielectric-stack strips
  • 文献类型:   Article
  • 作  者:   BIAN LA, HONG YJ, LI CW, LIU Y, WANG YK, HUANG KC
  • 作者关键词:   multimode absorption, gds strip, spp resonance, fp resonance
  • 出版物名称:   SUPERLATTICES MICROSTRUCTURES
  • ISSN:   0749-6036 EI 1096-3677
  • 通讯作者地址:  
  • 被引频次:   3
  • DOI:   10.1016/j.spmi.2020.106784 EA JAN 2021
  • 出版年:   2021

▎ 摘  要

Multiple near-unity absorption modes are achieved by employing the graphene-dielectric-stack (GDS) strips. Through exciting the surface plasmon polaritons (SPP) resonance and the Fabry-Perot (FP) resonance, the magnetic field is enhanced at graphene and the near impedance matching is obtained. It is found through the simulation method of rigorous coupled-wave analysis (RCWA) that different modes have distinct sensitivity against the change of the chemical potential of graphene, the geometric parameters of absorption structure along with the angle of incident light, since these modes relay on various resonances in varying degrees. Based on this, all of the modes number, the bandwidth and the peak-peak distance between different modes are controllable. The proposed functional device has tremendous potential applications in the terahertz range, such as multi-channel modulator, photoelectric detection and imaging.