Affordable Access

deepdyve-link
Publisher Website

Anisotropy of excitation and relaxation of photogenerated charge carriers in graphene.

Authors
  • Mittendorff, Martin1
  • Winzer, Torben
  • Malic, Ermin
  • Knorr, Andreas
  • Berger, Claire
  • de Heer, Walter A
  • Schneider, Harald
  • Helm, Manfred
  • Winnerl, Stephan
  • 1 Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119, 01314 Dresden, Germany. , (Germany)
Type
Published Article
Journal
Nano Letters
Publisher
American Chemical Society
Publication Date
Mar 12, 2014
Volume
14
Issue
3
Pages
1504–1507
Identifiers
DOI: 10.1021/nl404730y
PMID: 24559191
Source
Medline
License
Unknown

Abstract

We present a pump-probe experiment on graphene, which reveals a pronounced dependence of the pump-induced transmission on the angle between pump and probe polarization. It reflects a strong anisotropy of the pump-induced occupation of photogenerated carriers in momentum space. Within 150 fs after excitation, an isotropic carrier distribution is established. The experiments are well described by microscopic modeling, which identifies carrier-phonon scattering to be the main relaxation mechanism giving rise to an isotropic carrier distribution.

Report this publication

Statistics

Seen <100 times