Darmstadt 2008 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 24: Ultrakalte Moleküle [gemeinsam mit MO]
Q 24.2: Talk
Tuesday, March 11, 2008, 16:45–17:00, 3G
Engineering an all-optical route to ultracold molecules in their vibronic ground state — •Christiane P. Koch1 and Robert Moszynski2 — 1Freie Universität Berlin, Institut für Theoretische Physik, Arnimallee 14, 14195 Berlin, Germany — 2Dept. of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
We propose an improved photoassociation scheme to produce ultracold molecules in their vibronic ground state. Formation of molecules is achieved by short laser pulses in a Raman-like pump-dump process where an additional (near-)infrared laser field couples the excited state to an auxiliary state. The efficiency of population transfer is determined by the shape of the excited state potential; it is dauntingly low for typical potentials. In our proposal, the coupling due to the additional field effectively changes the shape of the excited state potential, allowing for efficient population transfer to v=0. Such a field-induced coupling can significantly enhance any short pulse Raman-like process.