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O: Fachverband Oberflächenphysik

O 69: Plasmonics and Nanooptics VI: Light-Matter Interactions and Characterisation

O 69.1: Vortrag

Mittwoch, 22. März 2017, 10:30–10:45, TRE Ma

Remote excitation and detection of surface-enhanced Raman scattering from graphene — •Nicolas Coca Lopez, Nina Gordon, Tobia Mancabelli, Nicolai Hartmann, and Achim Hartschuh — Department of Chemistry and Center for Nanoscience, Ludwig-Maximilian-University Munich

In this contribution, we show the remote excitation and detection of surface enhanced Raman scattering (SERS) from graphene. Surface plasmon polaritons (SPPs) were launched by focused laser illumination at the termination of a metallic nanowire (NW) which served as a plasmonic waveguide. An SPP excited by the laser travels to the other end of the waveguide that is placed on top of single layer graphene, resulting in the remote excitation of Raman scattering. In the reversed direction, locally excited Raman scattering from graphene is coupled to an SPP traveling along the NW and scattering out at its end. By projecting the sample scattered light onto a CCD camera mounted on a spectrometer we quantified the SPP contributions at different wavelengths in combination with polarization dependent measurements.