Darmstadt 2008 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 10: Kalte Moleküle I [gemeinsam mit MO]
Q 10.7: Vortrag
Dienstag, 11. März 2008, 10:15–10:30, 3G
Formation of ultracold heteronuclear dimers in electric fields — •Michael Mayle1, Rosario Gonzalez-Ferez2, and Peter Schmelcher1,3 — 1Theoretische Chemie, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg — 2Instituto ’Carlos I’ de Física Teórica y Computacional and Departamento de Física Atómica Molecular y Nuclear, Universidad de Granada, E-18071 Granada, Spain — 3Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg
The effects of a strong electric field on the radiative and steric properties of heteronuclear alkali dimers are investigated. In particular, we study the formation of ultracold LiCs molecules via stimulated emission followed by a radiative deexcitation cascade in the presence of a static electric field. By analyzing the corresponding cross sections, we demonstrate the possibility to populate the lowest rotational excitations via photoassociation. The modification of the radiative cascade due to the electric field leads to narrow rotational state distributions in the vibrational ground state. External fields might therefore represent an additional valuable tool towards the ultimate goal of quantum state preparation of molecules.