Strained graphene as a local probe for plasmon-enhanced Raman scattering by gold nanostructures

Sebastian Heeg; Antonios Oikonomou; Roberto Fernandez Garcia; Stefan A. Maier; Aravind Vijayaraghavan; Stephanie Reich

doi:10.1002/pssr.201308145

Strained graphene as a local probe for plasmon-enhanced Raman scattering by gold nanostructures

Sebastian Heeg, Antonios Oikonomou, Roberto Fernandez Garcia, Stefan A. Maier, Aravind Vijayaraghavan, Stephanie Reich

Research output: Contribution to journal › Article › Research › peer-review

11 Citations (Scopus)

Abstract

We investigate with Raman spectroscopy how gold nanostructures of different shape, size and geometry locally modify a graphene cover layer through strain. The resulting phonon softening translates into frequency downshifts of up to 85 cm^-1 for the 2D-mode of graphene. With spatially resolved and excitation dependent Raman measurements we demonstrate that the downshifted Raman peaks exclusively arise from strained graphene subject to plasmonic enhancement by the nanostructures. The signals arise from an area well below the size of the laser spot. They serve as a local probe for the interaction between graphene and intense light fields.

Original language	English
Pages (from-to)	1067-1070
Number of pages	4
Journal	Physica Status Solidi: Rapid Research Letters
Volume	7
Issue number	12
DOIs	https://doi.org/10.1002/pssr.201308145
Publication status	Published - Dec 2013
Externally published	Yes

Keywords

Graphene
Plasmons
Raman scattering
Strain

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10.1002/pssr.201308145

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abstract = "We investigate with Raman spectroscopy how gold nanostructures of different shape, size and geometry locally modify a graphene cover layer through strain. The resulting phonon softening translates into frequency downshifts of up to 85 cm-1 for the 2D-mode of graphene. With spatially resolved and excitation dependent Raman measurements we demonstrate that the downshifted Raman peaks exclusively arise from strained graphene subject to plasmonic enhancement by the nanostructures. The signals arise from an area well below the size of the laser spot. They serve as a local probe for the interaction between graphene and intense light fields.",

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AU - Heeg, Sebastian

AU - Oikonomou, Antonios

AU - Garcia, Roberto Fernandez

AU - Maier, Stefan A.

AU - Vijayaraghavan, Aravind

AU - Reich, Stephanie

PY - 2013/12

Y1 - 2013/12

N2 - We investigate with Raman spectroscopy how gold nanostructures of different shape, size and geometry locally modify a graphene cover layer through strain. The resulting phonon softening translates into frequency downshifts of up to 85 cm-1 for the 2D-mode of graphene. With spatially resolved and excitation dependent Raman measurements we demonstrate that the downshifted Raman peaks exclusively arise from strained graphene subject to plasmonic enhancement by the nanostructures. The signals arise from an area well below the size of the laser spot. They serve as a local probe for the interaction between graphene and intense light fields.

AB - We investigate with Raman spectroscopy how gold nanostructures of different shape, size and geometry locally modify a graphene cover layer through strain. The resulting phonon softening translates into frequency downshifts of up to 85 cm-1 for the 2D-mode of graphene. With spatially resolved and excitation dependent Raman measurements we demonstrate that the downshifted Raman peaks exclusively arise from strained graphene subject to plasmonic enhancement by the nanostructures. The signals arise from an area well below the size of the laser spot. They serve as a local probe for the interaction between graphene and intense light fields.

KW - Graphene

KW - Plasmons

KW - Raman scattering

KW - Strain

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JO - Physica Status Solidi: Rapid Research Letters

JF - Physica Status Solidi: Rapid Research Letters

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ER -

Strained graphene as a local probe for plasmon-enhanced Raman scattering by gold nanostructures

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Keywords

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