Düsseldorf 2007 – scientific programme

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MO: Fachverband Molekülphysik

MO 57: Poster: Quantum Control

MO 57.2: Poster

Thursday, March 22, 2007, 16:30–18:30, Poster A

Quantum control in strong laser fields with SPODS — Tim Bayer, •Andrea Klumpp, Dirk Liese, Cristian Sarpe-Tudoran, Andreas Präkelt, Matthias Wollenhaupt, and Thomas Baumert — Experimentalphysik III, CINSaT, Institut für Physik, Universität Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel

An exciting new strong field control scenario which makes explicit use of the manipulation of the temporal phase of a pulse sequence with attosecond precision was demonstrated recently [1]. The physical mechanism of this strong field scheme is based on Selective Population of Dressed States (SPODS). Since switching between selective population of either dressed states occurs within a few femtoseconds, this technique is also interesting for applications in the presence of decoherence processes. Because SPODS combines high selectivity and tunability with efficient population transfer, relevant applications to chemistry - so far investigated theoretically [2] are within reach. In our future work we will perform experiments with shaped femtosecond laser pulses on different molecules to understand and manipulate the underlying processes of ionization and fragmentation in strong laser fields. The complex electronic structure of the molecules and the molecular dynamics are the challenges for this mechanism. First measurements will be presented.

[1] M. Wollenhaupt, V. Engel, T. Baumert, Annu. Rev. Phy. Chem. 56, 25 (2005)

[2] M. Wollenhaupt, T. Baumert, J. Photochem. Photobiol. A, 180, 248-255 (2006)