Stuttgart 2012 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 6: Femtosecond Spectroscopy I

MO 6.6: Vortrag

Montag, 12. März 2012, 17:45–18:00, V38.03

Weak field, multiple cycle carrier envelope phase effects in laser excitation — •Klaus Renziehausen and Volker Engel — Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Emil-Fischer-Str. 42, 97074 Würzburg

Whereas the absolute or carrier envelope phase (CEP) of a laser pulse is usually assumed to be effective for ultrashort and/or ultrastrong pulses only, we demonstrate that these limitations can be removed. For an initial population distribution between different states of a quantum system interacting with an external field, it is possible to influence the population transfer in changing the CEP. Analytical results for a two-level system are presented. In a numerical example, we treat molecular excitation, where vibrational manifolds in two electronic states of the sodium dimer are coupled by the laser field.