Hamburg 2009 – scientific programme

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MO: Fachverband Molekülphysik

MO 5: Quantenkontrolle 1

MO 5.6: Talk

Monday, March 2, 2009, 15:15–15:30, VMP 6 HS-G

Robust Photon Locking — •Tim Bayer, Matthias Wollenhaupt, Cristian Sarpe-Tudoran, and Thomas Baumert — Universität Kassel, Institut für Physik und CINSaT, Heinrich-Plett-Str. 40, D-34132 Kassel, Germany

We experimentally demonstrate a strong--field coherent control mechanism that combines the advantages of Photon Locking (PL) and Rapid Adiabatic Passage (RAP). Unlike earlier implementations of PL and RAP by pulse sequences and chirped pulses respectively, we use shaped pulses generated by phase modulation of a femtosecond laser spectrum with a generalized phase discontinuity. The novel control scenario is characterized by a high degree of robustness achieved via adiabatic preparation of a state of maximum coherence. Subsequent phase control allows for efficient switching among different target states. We investigate both properties by photoelectron spectroscopy on potassium atoms interacting with the intense shaped light field. Since adiabatic Photon Locking combines efficient ultrafast switching with robustness, this scenario provides a novel tool for real--world applications in quantum control.