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A: Fachverband Atomphysik

A 15: Attosecond Physics I

A 15.4: Vortrag

Mittwoch, 10. März 2010, 17:15–17:30, F 107

Control of attosecond pulse generation using kinetic heterodyne mixing — •Philipp Raith, Christian Ott, and Thomas Pfeifer — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany

Tailored attosecond pulses generated by high-order harmonic generation provide coherent access to large-bandwidth electronic spectra and hence the possibility to directly control attosecond quantum dynamics in atoms, molecules and solids. Kinetic heterodyne mixing of a strong laser field with a weak field at a different frequency is an easily realizable method to shape the laser field of the driving femtosecond pulse on a subcycle basis and thus control the generation of attosecond pulses. An experimental design of such a pulse shaper is presented. Performing simulations of the shaped driver pulses and the resulting high-harmonic spectra it is shown how kinetic-heterodyne mixing can be used to generate isolated attosecond pulses. Furthermore, it is analyzed to which extent the spectrum and shape of attosecond pulses can be controlled e.g. to yield higher cutoff photon energies, to control attosecond pulse trains, or to generate very short isolated or double pulses for interferometry applications.