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O: Fachverband Oberflächenphysik

O 39: Graphene: Characterization and Devices (jointly with DS, HL, MA, and TT)

O 39.1: Vortrag

Mittwoch, 13. März 2013, 09:30–09:45, H17

Polarization dependence of phonon modes in graphene nanoribbons — •Felix Kampmann¹, Nils Scheuschner¹, Bernat Terrés^2,3, Christoph Stampfer^2,3, and Janina Maultzsch¹ — ¹Institut für Festkörperphysik, TU Berlin, Hardenbergstraße 36, 10623 Berlin, Germany, EU — ²JARA-FIT and II. Institute of Physics B, RWTH Aachen University, Aachen, Germany, EU — ³Peter Grünberg Institute (PGI-6/8/9), Forschungszentrum Jülich, Jülich, Germany, EU

Polarization dependent Raman spectroscopy has lately been used to investigate the edge states of few layer graphene revealing insight into the selection rules of their Raman modes.

Here we report polarization dependent Raman measurements on single-layer graphene nanoribbons with varying width down to 30 nm.

We show that the cos²(θ) behavior of the intensity ratio I(D)/I(G) can be reproduced as it has already been known for the graphene edge states. Furthermore we found a similar behavior for I(D′)/I(G) and discuss the dependence on the nanoribbon width.