• 文献标题:   Numerical Investigation of Slow Light Propagation in Graphene-Based Waveguides
  • 文献类型:   Article
  • 作  者:   EMADI R, SAFIAN R, NEZHAD AZ
  • 作者关键词:   graphene nanoribbon gnr, nonlocal model, slow wave, surface plasmon polariton spp, waveguide
  • 出版物名称:   IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
  • ISSN:   0018-9375 EI 1558-187X
  • 通讯作者地址:   Isfahan Univ Technol
  • 被引频次:   3
  • DOI:   10.1109/TEMC.2018.2795891
  • 出版年:   2018

▎ 摘  要

In this paper, electronic modeling and electromagnetic modeling of graphene nanoribbons (GNRs) are rigorously investigated. From the electronic point of view, a GNR is modeled through its linear band diagram; in this regard, the GNR is doped electrostatically in a waveguide configuration. Then, the capacitance of this waveguide is computed according to the associated hand diagram. From the electromagnetic point of view, the GNR is considered as a conducting sheet, which is characterized by an effective conductivity. Then, a waveguide switch comprised of three GNRs is designed, which supports TM-polarized surface plasmon polariton propagation modes at 30 THz. To reach a miniaturized structure, the group velocity of plasmons is decreased to be comparable with Fermi velocity in graphene; consequently, an effective conductivity model is required to accurately predict propagation of slow waves in the GNRs. Finally, this conductivity model is verified by proposing a nonlocal circuit model.