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Updated: Jun 3, 2026

Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle
Published on: September 22, 2015
Plasmon electron-hole resonance in epitaxial graphene
C Tegenkamp1, H Pfnür, T Langer
1Institut für Festkörperphysik, Leibniz-Universität Hannover, Appelstrasse 2, 30167 Hannover, Germany. tegenkamp@fkp.uni-hannover.de
Abstract:
The quasiparticle dynamics of the sheet plasmons in epitaxially grown graphene layers on SiC(0001) has been studied systematically as a function of temperature, intrinsic defects, influence of multilayers and carrier density using electron energy loss spectroscopy with high energy and momentum resolution. The opening of an inter-band decay channel appears as an anomalous kink in the plasmon dispersion which we describe as a resonance effect in the formation of electron-hole pairs. Due to the inevitable strong coupling of plasmons with single particle excitations in reduced dimensions, such signatures are generally expected.
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