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Spectrally resolved coherent transient signal for ultracold rubidium molecules

: Eimer, F.; Weise, F.; Merli, A.; Birkner, S.; Sauer, F.; Wöste, L.; Lindinger, A.; Aanolu, R.; Koch, C.P.; Salzmann, W.; Mullins, T.; Götz, S.; Wester, R.; Weidemüller, M.


The European Physical Journal. D, atomic, molecular and optical physics 54 (2009), No.3, pp.711-714
ISSN: 1434-6060
ISSN: 1434-6079
Journal Article
Fraunhofer IPM ()

We present spectrally resolved pump-probe experiments on the photoassociation of ultracold rubidium atoms with shaped ultrashort laser pulses. The pump pulse causes a free-bound transition leading to a coherent transient signal of rubidium molecules in the first excited state. In order to achieve a high frequency resolution the bandwidth of the pump pulse is reduced to a few wavenumbers. The frequency dependence of the transient signal close to the D1 atomic resonance is investigated for characteristic pump-probe delay times. The observed spectra, which show a pronounced dip for pump-probe coincidence, are interpreted using quantum dynamical calculations.