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Q: Fachverband Quantenoptik und Photonik

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

Q 15.14: Poster

Monday, March 14, 2011, 16:30–19:30, P1

(contribution withdrawn) Time Resolved Electron Diffraction of a Charge Density Wave — •Eichberger Maximilian¹, Schäfer Hanjo¹, Krumova Marina¹, Beyer Markus¹, Demsar Jure¹, Moriena Gustavo², Sciaini German², and Miller Dwayne² — ¹Universität Konstanz, Germany — ²University of Toronto, Canada

We employed femtosecond electron diffraction (FED) and all-optical pump probe experiments on the 2D charge density wave (CDW) system 1T-TaS_2, studying the order parameter relaxation therein. The data suggest an optically induced suppression of the CDW within ~250 fs, followed by a purely electronic relaxation which is faster than ~100 fs. The order parameter of the CDW however, recovers on a timescale of several picoseconds which can be directly assessed by the FED data and also indirectly by the undertaken all-optical pump probe experiments.