Strongly enhanced Raman scattering of graphene by a single gold nanorod

Journal Article · Mon Aug 03 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4927759· OSTI ID:22489062

He, Yingbo; Shen, Hongming; Cheng, Yuqing ^[1]; Lu, Guowei; Gong, Qihuang ^[1]

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1. State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871 (China)

Individual gold nanorods (AuNRs) and monolayer graphene hybrid system is investigated experimentally. Surface enhanced Raman scattering (SERS) signal of the graphene is observed due to a single AuNR with enhancement factor up to ∼1000-fold. The SERS intensity is strongly polarization dependent and the enhancement effect varies with the detuning between the excitation laser and the AuNR resonance. The SERS effect is highest when the resonant wavelength of the AuNRs matches well with the excitation light. By correlating the scattering and photoluminescence, it is demonstrated that the conventional background in SERS ascribes to the photon emission of metallic nanostructures.

• OSTI ID: 22489062
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 5 Vol. 107; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EXCITATION
GOLD
GRAPHENE
NANOSTRUCTURES
PHOTOLUMINESCENCE
RAMAN EFFECT
SURFACES
WAVELENGTHS