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Mittendorff M, Winzer T, Malic E, et al. Anisotropy of excitation and relaxation of photogenerated charge carriers in graphene. Nano Lett. 2014;14(3):1504-7doi: 10.1021/nl404730y.
Mittendorff, M., Winzer, T., Malic, E., Knorr, A., Berger, C., de Heer, W. A., Schneider, H., Helm, M., & Winnerl, S. (2014). Anisotropy of excitation and relaxation of photogenerated charge carriers in graphene. Nano letters, 14(3), 1504-7. https://doi.org/10.1021/nl404730y
Mittendorff, Martin, et al. "Anisotropy of excitation and relaxation of photogenerated charge carriers in graphene." Nano letters vol. 14,3 (2014): 1504-7. doi: https://doi.org/10.1021/nl404730y
Mittendorff M, Winzer T, Malic E, Knorr A, Berger C, de Heer WA, Schneider H, Helm M, Winnerl S. Anisotropy of excitation and relaxation of photogenerated charge carriers in graphene. Nano Lett. 2014 Mar 12;14(3):1504-7. doi: 10.1021/nl404730y. Epub 2014 Feb 24. PMID: 24559191.
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Nano Lett. 2014 Mar 12;14(3):1504-7. doi: 10.1021/nl404730y. Epub 2014 Feb 24.

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

Nano letters

Martin Mittendorff, Torben Winzer, Ermin Malic, Andreas Knorr, Claire Berger, Walter A de Heer, Harald Schneider, Manfred Helm, Stephan Winnerl

Affiliations

  1. Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119, 01314 Dresden, Germany.

PMID: 24559191 DOI: 10.1021/nl404730y

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.

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