Düsseldorf 2007 – scientific programme

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MO: Fachverband Molekülphysik

MO 61: Quantum Control I

MO 61.2: Talk

Friday, March 23, 2007, 10:45–11:00, 6F

Laserinduced breathing mode in highly excited C₆₀ — •Jan Handt¹ and Rüdiger Schmidt² — ¹Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Strasse 38, D-01187 Dresden — ²Institut für Theoretische Physik, Technische Universität Dresden, D-01062 Dresden

We present, a theoretical study of the excitation of C₆₀ by strong laser pulses. We use the so-called nonadiabatic quantum molecular dynamics (NA-QMD) which combines self-consistently the electron dynamics treated with time-dependent density functional theory (td-DFT) and classical molecular dynamics. Exciting the molecule via the t_1g resonance our calculations show a strong multielectron excitation of C₆₀. Surprisingly most of the vibrational energy is stored in the a_g(1) breathing mode. The period of the breathing mode depends on the deposited energy. We show, that oscillations observed in pump-probe and optimal-control experiments are due to this effect [1]. [1] T. Laarmann, I. Shchatsinin, A. Stalmashonak, M. Boyle, N. Zhavoronkov, J. Handt, R. Schmidt, C. P. Schulz, and I.V. Hertel, Physical Review Letters, in press (2006)