• 文献标题:   Active and selective manipulation of dual transparency windows in hybrid graphene-vanadium dioxide metamaterial
  • 文献类型:   Article
  • 作  者:   SHU C, MEI JS
  • 作者关键词:   eit metamaterial, graphene, vo2, dual transparency window
  • 出版物名称:   OPTIK
  • ISSN:   0030-4026 EI 1618-1336
  • 通讯作者地址:  
  • 被引频次:   1
  • DOI:   10.1016/j.ijleo.2021.168519
  • 出版年:   2022

▎ 摘  要

Active and selective manipulation of dual-spectral electromagnetically induced transparency (EIT) metamaterial constructed by three graphene strips and vanadium dioxide (VO2) layer is proposed and demonstrated numerically. Simulation results illustrate that the dual-spectral EITlike effect are induced by adjacent graphene strips acted as bright and bright mode and excited opposite-phase electric field distributions. One or two of EIT-like windows can be modulated by selectively varying graphene strip's Fermi energy. Meanwhile, the Fermi energies of three graphene strips are varying simultaneously, the position of dual transparency windows as a whole obviously exhibit blue shift. Moreover, the amplitude of dual-spectral EIT windows can be simultaneously manipulated while frequency remain rough constant during the phase transition process of VO2. The physical mechanism underneath the phenomenon of actively and selectively tunable EIT, which is revealed by theoretically calculated results based on the classical three oscillator model, can be attributed to the variation of resonance frequency, coupling coefficient and losses of the resonators caused by varying Fermi energy of graphene strips and conductivity of VO2.