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Q: Fachverband Quantenoptik und Photonik
Q 49: Ultrakurze Pulse: Anwendungen II
Q 49.2: Talk
Thursday, March 5, 2009, 14:15–14:30, VMP 6 HS-A
Attosecond control of electron dynamics in a multi-electron molecule — •Philipp von den Hoff1, Irina Znakovskaya2, Matthias Kling2, and Regina de Vivie-Riedle1 — 1Ludwig-Maximilians-Universität, München, Deutschland — 2Max-Planck Institut für Quanten Optik, Garching, Deutschland
Laser pulses with stable electric field waveforms have opened up the opportunity to achieve coherent control on attosecond timescales. Waveform controlled few-cycle pulses have only recently been used to control electron localization in the dissociative ionization of the prototype molecules D2 and HD. After initial ionization, these systems contain a single electron. The steering of this electron originates from a light-induced coherent superposition of two electronic states. The CEP controls the directional emission of charged and uncharged fragments upon the break-up of the molecule. The theoretical description of coupled electron and nuclear dynamics in multi-electron molecules is a challenge and its appropriate treatment the aim of state-of-the-art research. We present theoretical results on the direct strong-field control of electronic motion in the multi-electron system CO+. The experimentally observed high degree of CEP control over the directional emission of C+ and O+ fragments from the dissociative ionization of CO can be explained as an interplay between the asymmetry in the ionization step and the laser induced asymmetry during the dissociation. Our theoretical treatment is in good qualitative and quantitative agreement with the experimental observation.