• 文献标题:   Electromagnetic local density of states in graphene-covered porous silicon carbide
  • 文献类型:   Article
  • 作  者:   ZHOU T, WANG TB, LIAO QH, LIU JT, YU TB, LIU NH
  • 作者关键词:   electromagnetic density of state, graphene plasmon, surface phonon polariton
  • 出版物名称:   PHYSICS LETTERS A
  • ISSN:   0375-9601 EI 1873-2429
  • 通讯作者地址:   Nanchang Univ
  • 被引频次:   2
  • DOI:   10.1016/j.physleta.2017.04.006
  • 出版年:   2017

▎ 摘  要

Surface phonon polariton supported by silicon carbide (SiC) can be strongly coupled with graphene plasmon in the graphene-covered SiC bulk. The spectrum of the electromagnetic local density of states exhibits two peaks whose positions can be tuned by the chemical potential of graphene. In this work, we study the electromagnetic local density of states in the proximity of a graphene-covered SiC with periodic hole arrays. The well-known peak from the coupling of surface polariton supported by SiC and graphene plasmon splits into two. With increased volume ratio of holes; one of the split peak shifts towards high frequencies, whereas the other moves towards low frequencies. The dependence of split-peak positions on the chemical potential and permittivity of filling materials in the holes are also investigated. This study offers another method of modulating the electromagnetic local density of states. (C) 2017 Elsevier B.V. All rights reserved.