Hamburg 2009 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 53: Ultrakurze Pulse: Anwendungen III

Q 53.1: Talk

Thursday, March 5, 2009, 16:30–16:45, VMP 6 HS-A

Concepts of phase, amplitude, and polarization shaping — •Fabian Weise, Stefan M. Weber, Mateusz Plewicki, Ludger Wöste, and Albrecht Lindinger — Institut für Experimentalphysik, Freie Universität Berlin, Arnimalle 14, 14195 Berlin

Femtosecond pulse shaping is a very powerful technique and was successfully applied to a variety of different systems - especially in the field of coherent control. Extending the common parameters phase and amplitude by including the parameter polarization became an emerging topic in the past few years. Since physical systems are mostly three dimensional, adding the polarization increases significantly the controllability.

Initially, we will discuss different concepts of femtosecond polarization shaping and their experimental implementation. We present new setups for pulse shaping which enable us to simultaneously and independently modulate the parameter phase, amplitude, and polarization. We demonstrate the capabilities of these setups using systematic scans of the relevant pulse parameters and parametric example pulses.

Furthermore, we present the implementation in a feedback loop optimization of multi photon ionization of NaK in a molecular beam. The resulting pulse increases the ionization yield compared to a pulse without polarization modulation. The pulse form reveals the ionization dynamics including the orientation of the transition dipole moment of the participating electronic states.