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Highly enhanced Raman scattering of graphene using plasmonic nano-structure.

ABSTRACT: Highly enhanced Raman scattering of graphene on a plasmonic nano-structure platform is demonstrated. The plasmonic platform consists of silver nano-structures in a periodic array on top of a gold mirror. The gold mirror is used to move the hot spot to the top surface of the silver nano-structures, where the graphene is located. Two different nano-structures, ring and crescent, are studied. The actual Raman intensity is enhanced by a factor of 890 for the G-peak of graphene on crescents as compared to graphene on a silicon dioxide surface. The highest enhancement is observed for the G-peak as compared to the 2D-peak. The results are quantitatively well-matched with a theoretical model using an overlap integral of incident electric field intensities with the corresponding intensities of Raman signals at the G- and 2D-peaks. The interaction of light with nano-structures is simulated using finite element method (FEM).

SUBMITTER: Khorasaninejad M

PROVIDER: S-EPMC3796293 | biostudies-literature | 2013 Oct

REPOSITORIES: biostudies-literature

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Highly enhanced Raman scattering of graphene using plasmonic nano-structure.

Khorasaninejad M M Raeis-Zadeh S M SM Jafarlou S S Wesolowski M J MJ Daley C R CR Flannery J B JB Forrest J J Safavi-Naeini S S Saini S S SS

Scientific reports 20131014

Highly enhanced Raman scattering of graphene on a plasmonic nano-structure platform is demonstrated. The plasmonic platform consists of silver nano-structures in a periodic array on top of a gold mirror. The gold mirror is used to move the hot spot to the top surface of the silver nano-structures, where the graphene is located. Two different nano-structures, ring and crescent, are studied. The actual Raman intensity is enhanced by a factor of 890 for the G-peak of graphene on crescents as compar ...[more]

PMID: 24121787

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