Hannover 2010 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 24: Poster: Quantum Control
MO 24.8: Poster
Donnerstag, 11. März 2010, 16:00–18:30, Lichthof
Control of doped He nanodroplet dynamics with shaped femtosecond pulses — •Terry Mullins1, Christian Giese1, Barbara Grüner1, Frank Stienkemeier1, Marcel Mudrich1, Roland Wester1, and Matthias Weidemüller2 — 1Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3 79104 Freiburg, Germany — 2Physikalisches Institut, Universität Heidelberg, Philosophenweg 12 69120 Heidelberg, Germany
We investigate the coherent excitation and ionization dynamics of doped He nanodroplets interacting with shaped ultrashort laser pulses. Atoms or molecules can be doped onto the nanodroplets and are thereby cooled. Excitation and ionization dynamics of the dopant atoms/molecules can be strongly influenced by their interaction with He on short time-scales and coherence effects can play an important role [1,2]. By applying shaped ultrashort pulses the quantum dynamics of the coupled alkali-droplet system can be coherently controlled. We are working towards addressing the vibrational wavepacket dynamics of Rb2 and even the RbHe exciplex formation. The pulses are shaped using an SLM-based 4f setup [3]. Independent phase and amplitude shaping of the excitation pulse is possible and can also be applied within a feedback loop.
[1] M. Mudrich et al., Phys. Rev. A 80, 042512 (2009).
[2] M. Mudrich et al., Phys. Rev. Lett. 100, 023401 (2008).
[3] A. M. Weiner et al., J. Quant. Elec. 28, 908 (1992).