Dresden 2014 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 108: Poster: Ultra-fast phenomena / Optical properties / Semiconductor laser / Devices and device concepts
HL 108.1: Poster
Donnerstag, 3. April 2014, 17:00–20:00, P1
Laserinduced heating of nanocrystalline graphene monitored by Ultrafast Electron Diffraction — Silvio Morgenstern1, Christian Gerbig1, •Xaver Holzapfel1, Christan Sarpe1, Arne Senftleben1, Matthias Wollenhaupt2, and Thomas Baumert1 — 1University of Kassel, Institute of Physics and Center of Interdisciplinary Nanostructure Science and Technology (CINSaT), D-34132 Kassel, Germany — 2University of Oldenburg, Institute of Physics, D-26111 Oldenburg, Germany
Ultrafast Electron Diffraction (UED) has lately become one of the most promising techniques to directly provide insights into fundamental dynamics in solids at the microscopic level and on the pico- to subpicosecond timescale [1,2].
In this contribution we present our UED-setup to reach a high spatial and temporal resolution below 200 fs [3]. Additionally we present first results of time-resolved diffraction experiments on nanocrystalline graphene [4] and discuss the possibility of time-resolved observations of out-of-plane dynamics in such materials [5]. Finally we compare our results to results from CVD-graphene [6].
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[4] A. Truchanin, ACS Nano Vol. 5, No. 5, 3896 (2011)
[5] J. C. Meyer, Nature 446, 60-63 (2007)
[6] M. Schäfer, New J. Phys. 13, 063030 (2011)