Hannover 2013 – scientific programme

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MO: Fachverband Molekülphysik

MO 15: Femtosecond Spectroscopy IV

MO 15.2: Talk

Wednesday, March 20, 2013, 11:30–11:45, F 102

Observation and manipulation of electron dynamics in level systems — •Hendrike Braun, Dominik Pengel, Cristian Sarpe, Matthias Wollenhaupt, and Thomas Baumert — University of Kassel, Institute of Physics and CINSaT, D-34132 Kassel, Germany

The aim of coherent control is to guide a system from an initial state to a preselected target state. Therefore the final population in the target state is generally used as the observable. However, particularly in strong laser fields, the transient dynamics is strongly influenced by nonperturbative interactions such as level shifts. To this end we investigate the transient and final population electron dynamics in the potassium atom during the interaction with a strong resonant laser field. Femtosecond laser pulses are used to induce, control, and probe the electron motion in the level system. A carefully devised two-colour experiment allows for the investigation of the light induced energetic level shifts as well as the transient and final populations.