Berlin 2005 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 16: Time-resolved phenomena

CPP 16.4: Vortrag

Montag, 7. März 2005, 17:15–17:30, TU C243

Theory of optimal laser pulse control of molecular dynamics: Optimizing the probe-pulse signal of a pump-probe-scheme — •Andreas Kaiser and Volkhard May — Humboldt-Universität zu Berlin, Institut für Physik, Newtonstraße 15, D-12489 Berlin, Germany

In order to achieve femtosecond laser pulse control of molecular systems, it has become of interest to consider an optical signal as an observable to be maximized, see e.g. [1,2]. For the case of a two-color pump-probe scheme we present a formulation of the optimal control theory. This approach allows to calculate the pump-pulse shape which sets the system in such a state that leads to a maximization of the probe-pulse absorption signal [3]. The application of this method is demonstrated using an NaK molecule as a model system. Considering the three lowest Σ-levels, we study the outcome of the control yield in the dependence of different probe-pulse parameters like central frequency and pulse length. It turns out that e.g. depending on the central frequency the absorption signal has a maximum for a specific pulse length.

• [1.] J. L. Herek, W. Wohlleben, R. J. Cogdell, D. Zeidler, M. Motzkus, Nature 417 (2002) 533.
• [2.] T. Brixner, N. H. Damrauer, B. Kiefer, G. Gerber, J. Chem. Phys. 118 (2003) 3692.
• [3.] A. Kaiser, V. May, J. Chem. Phys. 121 (2004) 2528.