Darmstadt 2008 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 18: Femtosekundenspektroskopie

MO 18.8: Poster

Dienstag, 11. März 2008, 14:00–19:00, Poster C1

Quantum dynamical simulations of femtosecond Pump-DFWM spectroscopy of higher excited states — •Jörg Liebers, Abraham Scaria, Vinu Namboodiri, Jakow Konradi, Arnulf Materny, and Ulrich Kleinekathöfer — Jacobs University Bremen, Germany

Nonlinear time- and frequency-resolved four-wave mixing (FWM) spectroscopy is one of the major tools to investigate dynamic properties of molecules. Until now the dynamics of the ground state and lower lying excited states were accurately investigated in numerous experiments. Recently it was demonstrated that dynamics of higher lying excited states in molecular iodine can be accessed and probed by a time-resolved DFWM process as well by combining the DFWM process with an initial pump pulse [1]. In this contribution we present the results of quantum dynamical simulations of rovibrational wavepackets which reproduce the results of these experiments. The wavepacket dynamics on the potential energy surfaces of the ion pair states of iodine were calculated for different pulse sequences and compared to the dynamics monitored in the experiments. The experiments are detailed in a separate contribution.

[1] A. Scaria, V. Namboodiri, J. Konradi, and A. Materny, J. Chem. Phys. 127, 144305 (2007)