Fabian Weise et al 2009 J. Phys. B: At. Mol. Opt. Phys. 42 215307 doi:10.1088/0953-4075/42/21/215307
Fabian Weise1, Andrea Merli1, Frauke Eimer1, Sascha Birkner1, Franziska Sauer1, Ludger Wöste1, Albrecht Lindinger1, Wenzel Salzmann2, Terence G Mullins2, Roland Wester2, Matthias Weidemüller3, Ruzin Ağanoğlu4 and Christiane P Koch4
Show affiliationsWe investigate the interaction of femtosecond laser pulses with an ensemble of ultracold rubidium atoms by applying shaped excitation pulses with two different types of spectral filtering. Although the pulses, which are frequency filtered with a high pass, have no spectral overlap with molecular states, we observe coherent molecular transients. Similar transients obtained with nearly transform-limited pulses, where only the atomic resonance is removed, reveal two differing oscillatory components. The resulting transients are compared among themselves and supported with quantum dynamical simulations which indicate a photoassociation process. The effect is due to the strong field interaction of the pulse with the colliding atom pair.
82.30.Nr Association, addition, insertion, cluster formation
Issue 21 (14 November 2009)
Received 4 August 2009, in final form 23 September 2009
Published 27 October 2009
Fabian Weise et al 2009 J. Phys. B: At. Mol. Opt. Phys. 42 215307
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