Graphene induced tunability of the surface plasmon resonance

Jing Niu, Young Jun Shin, Youngbin Lee, Jong Hyun Ahn, Hyunsoo Yang

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

Tunability of the surface plasmon resonance wavelength is demonstrated by varying the thickness of Al 2O 3 spacer layer inserted between the graphene and nanoparticles. By varying the spacer layer thickness from 0.3 to 1.8 nm, the resonance wavelength is shifted from 583 to 566 nm. The shift is due to a change in the electromagnetic field coupling strength between the localized surface plasmons excited in the gold nanoparticles and a single layer graphene film. In contrast, when the graphene film is absent from the system, no noticeable shift in the resonance wavelength is observed upon varying the spacer thickness.

Original languageEnglish
Article number061116
JournalApplied Physics Letters
Volume100
Issue number6
DOIs
Publication statusPublished - 2012 Feb 6

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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