Düsseldorf 2007 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 29: Poster: Cold Molecules
MO 29.2: Poster
Dienstag, 20. März 2007, 16:30–18:30, Poster A
Controlling Molecular Orientation through Radiative Rotational Transitions in Strong Static Electric Fields — •Michael Mayle1, Rosario Gonzalez-Ferez2, and Peter Schmelcher1,3 — 1Theoretische Chemie, Physikalisch-Chemisches Institut, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany — 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, D-69120 Heidelberg, Germany
The effects of a static, homogeneous and strong electric field on the radiative and steric properties of the LiCs molecule in its 1Σ+ electronic ground state are investigated. Combining discretization and basis-set methods, the rovibrational Schrödinger equation is solved and dipole transition rates are calculated. Spontaneous emission decay rates and radiative lifetimes of rovibrationally excited states have been studied extensively, incorporating in particular the interaction with the external field. Furthermore, the intriguing possibility to control the alignment and orientation of the molecules by applying a sufficiently strong field while switching between different rotational configurations via absorption and emission processes is demonstrated.