Dresden 2011 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 39: Quantum Control
Q 39.4: Talk
Wednesday, March 16, 2011, 17:15–17:30, TOE 317
Resonant Strong-Field Control of Electron Dynamics in K2 — Tim Bayer, •Hendrike Braun, Cristian Sarpe, Matthias Wollenhaupt, and Thomas Baumert — University of Kassel, Institute of Physics and CINSaT, D-34132 Kassel, Germany
The strong-field control mechanism SPODS (Selective Population of Dressed States) has been demonstrated on atoms by using variously shaped femtosecond laserpulses [1,2,3]. The applicability of SPODS to the coherent control of molecules and chemical reactions was pointed out by wave packet calculations on K2 [4]. Here, we present an experimental demonstration of the molecular strong-field control scheme proposed in [4]. Employing pulse sequences from sinusoidal and blurred step phase modulation respectively, we steer the molecular system, i.e. nuclear wave packet, from a well-defined ground state via a transient state of maximum electronic coherence towards a preselected target state. By exerting control on the dressed states of a resonant subsystem we are able to selectively adress different target channels within a manifold of final states with high efficiency. That is, the control of electronic coherences gives rise to effective manipulation of nucelar coherences. Since dressed state splittings in the order of several 100 meV are readily achieved experimentally, the devised SPODS control scheme offers prospect to various applications in femtochemistry.
[1] M. Wollenhaupt et al., Phys. Rev. A 68, 0154011 (2003)
[2] M. Wollenhaupt et al., Phys. Rev. A 73, 063409-1 (2006)
[3] T. Bayer et al., Phys. Rev. Lett. 102, 023004 (2009)
[4] M. Wollenhaupt et al., JPPA 180, 248 (2006)