Regensburg 2010 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 5: Ultra-fast Phenomena

HL 5.8: Vortrag

Montag, 22. März 2010, 12:15–12:30, H17

Attosecond dynamics of plasmon formation — •Andrey Moskalenko, Yaroslav Pavlyukh, and Jamal Berakdar — Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Nanotechnikum-Weinberg, Heinrich-Damerow-St. 4, 06120 Halle, Germany

Using ab-initio methods we calculate the frequencies of collective excitations for a variety of finite systems, such as fullerenes and quasi-spherical large molecules [1]. To unravel how this collective dynamics unfolds upon fast excitations, based on our ab-initio results we developed a method, in the spirit of [2], that captures the ultrafast formation of plasmon modes due to the mean-field fluctuations. The results are illustrated for a pump-probe setup using attosecond XUV pulses.

[1] Y. Pavlyukh and J. Berakdar, Chem. Phys. Lett. 468, 313 (2009).

[2] K. Morawetz, P. Lipavsky, and M. Schreiber, Phys. Rev. B 72,

233203 (2005).