Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster 1: Quanteninformation, Quanteneffekte, Laserentwicklung, Laseranwendungen, Ultrakurze Pulse, Photonik

Q 15.7: Poster

Montag, 14. März 2011, 16:30–19:30, P1

Preparation of free-standing single and few-layer Graphene for Ultrafast Electron Diffraction experiments — •Silvio Morgenstern, Christian Gerbig, Cristian Sarpe, Matthias Wollenhaupt, and Thomas Baumert — University of Kassel, Institute of Physics and Center of Interdisciplinary Nanostructure Science and Technology (CINSaT), D-34132 Kassel, Germany

Graphene is a recently discovered material with unique properties arising from its 2D crystal lattice [1]. The preparation and characterization of single- and few-layer graphene (SLG/FLG) with various methods on different substrates [1,2] as well as free-standing membrans [3] is a highly active field of research. The investigation of structural dynamics in graphene after ultrashort laser excitation should bring new insights in its mechanical and optical properties.
In this contribution we present first results on the preparation of free-standing SLG/FLG and the direct observation of optically induced lattice heating in these material using Ultrafast Electron Diffraction [4]. In addition, we show improvements and a new approach of our setup, leading to an enhanced spatial and temporal resolution.

[1] A. K. Geim & K. S. Novoselov, Nature Materials 6, 183 (2007)
[2] S. Park & R. S. Rouff, Nature Nanotechnology 4, 217 (2009)
[3] J. C. Meyer et al., Appl. Phys. Lett. 92, 123110 (2008)
[4] M. Chergui & A. H. Zewail, Chem. Phys. Chem. 10, 28 (2009)