Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster 1: Quanteninformation, Quanteneffekte, Laserentwicklung, Laseranwendungen, Ultrakurze Pulse, Photonik

Q 15.17: Poster

Montag, 14. März 2011, 16:30–19:30, P1

Accurate generation of polarization-shaped femtosecond laser pulses with zeptosecond precision — Jens Köhler, Tim Bayer, Cristian Sarpe, •Tom Bolze, Matthias Wollenhaupt, and Thomas Baumert — Universität Kassel, Institut für Physik und CINSaT, Heinrich-Plett-Str. 40, D-34132 Kassel, Germany

Femtosecond laser pulse shaping is the key technology in quantum control. In particular, polarization-shaped pulses are of current interest, because they exploit the vectorial aspects of light-matter interaction, i.e. they are well-suited for 3D coherent control. We demonstrate realization of accurately generated polarization-shaped pulses delivering full control over the polarization state in the interaction region of a vacuum chamber employing photoelectron imaging spectroscopy [1]. Currently, we extend the application of our polarization-shaping capabilities to the generation of “designer” free-electron wave packets characterized by 3D tomographic reconstruction [2]. In addition, we have investigated the precision achievable in the generation of a pulse pair by making use of phase- and amplitude modulation of femtosecond laser pulses. To this end, we study the interference signal of two temporally delayed pulses as well as ultrafast switching of photoelectron spectra via Photon-Locking by temporal phase discontinuities [3]. Our results show, that the pulse-to-pulse delay and the relative temporal phase can be controlled with zeptosecond precision.

[1] M. Wollenhaupt et al., Applied Physics B, 95(2), 245–259, (2009)

[2] M. Wollenhaupt et al., Applied Physics B, 95(4), 647–651, (2009)

[3] M. Wollenhaupt et al., Phys. Rev. A, 73(6), 063409, (2006)