• 文献标题:   Propagation and refraction of left-handed plasmons on a semiconducting substrate covered by graphene
  • 文献类型:   Article
  • 作  者:   ZIVARI A, BAGHERI A, REJAEI B, KHAVASI A
  • 作者关键词:  
  • 出版物名称:   OPTICS LETTERS
  • ISSN:   0146-9592 EI 1539-4794
  • 通讯作者地址:   Sharif Univ Technol
  • 被引频次:   0
  • DOI:   10.1364/OL.43.002010
  • 出版年:   2018

▎ 摘  要

We show that a plasmonic semiconductor substrate can support highly confined surface plasmons when it is covered by a graphene layer. This occurs when the imaginary part of graphene conductivity and real part of the effective permittivity of the surrounding medium become simultaneously negative. Full-wave electromagnetic simulations demonstrate the occurrence of negative refraction and two-dimensional lensing at the interface separating regions supporting conventional right-handed graphene plasmons and left-handed surface plasmon polaritons. (C) 2018 Optical Society of America.