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

被引：11

作者：

Heeg, Sebastian ^{[1
]}

Oikonomou, Antonios ^{[2
,3
]}

Garcia, Roberto Fernandez ^{[4
]}

Maier, Stefan A. ^{[4
]}

Vijayaraghavan, Aravind ^{[3
,5
]}

Reich, Stephanie ^{[1
]}

机构：

[1] Free Univ Berlin, Dept Phys, D-14195 Berlin, Germany

[2] Univ Manchester, Sch Comp Sci, Manchester M13 9PL, Lancs, England

[3] Univ Manchester, Ctr Mesosci & Nanotechnol, Manchester M13 9PL, Lancs, England

[4] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England

[5] Univ Manchester, Sch Mat, Manchester M13 9PL, Lancs, England

来源：

PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS | 2013年 / 7卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

plasmons; Raman scattering; graphene; strain; SPECTROSCOPY;

D O I：

10.1002/pssr.201308145

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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. ((c) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

引用

页码：1067 / 1070

页数：4

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