• 文献标题:   Frequency pulling and line-shape broadening in graphene Raman spectra by resonant Stokes surface plasmon polaritons
  • 文献类型:   Article
  • 作  者:   GHAMSARI BG, OLIVIERI A, VARIOLA F, BERINI P
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121 EI 1550-235X
  • 通讯作者地址:   Univ Ottawa
  • 被引频次:   11
  • DOI:   10.1103/PhysRevB.91.201408
  • 出版年:   2015

▎ 摘  要

This Rapid Communication reports on the modulation of the position and linewidth of the G and 2D Raman bands for monolayer graphene through coupling to surface plasmon polaritons (SPPs). It is shown that gold nanoresonators tuned to the graphene Stokes emission frequency, not the laser pump, broaden the G and 2D peaks and shift them to lower wave numbers, in addition to enhancing the Raman scattering cross section. The variation of the band displacement and broadening with the SPPs' frequency demonstrates a strongly dispersive phenomenon, ruling out chemical, mechanical, and thermal mechanisms. It is believed that strong graphene-SPP coupling is responsible for the frequency pulling and line-shape broadening.