title: 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).
authors.affiliation: 1] Department of Electrical and Computer Engineering, University of Waterloo, 200 University Ave. West, Waterloo, N2L 3G1 [2] Waterloo Institute of Nanotechnology, University of Waterloo, 200 University Ave. West, Waterloo, N2L 3G1.
authors.forename: M
authors.initials: M
authors.lastname: Khorasaninejad
authors.forename: S M
authors.initials: SM
authors.lastname: Raeis-Zadeh
authors.forename: S
authors.initials: S
authors.lastname: Jafarlou
authors.forename: M J
authors.initials: MJ
authors.lastname: Wesolowski
authors.forename: C R
authors.initials: CR
authors.lastname: Daley
authors.forename: J B
authors.initials: JB
authors.lastname: Flannery
authors.forename: J
authors.initials: J
authors.lastname: Forrest
authors.forename: S
authors.initials: S
authors.lastname: Safavi-Naeini
authors.forename: S S
authors.initials: SS
authors.lastname: Saini