Heidelberg 2015 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 24: Attosecond physics
A 24.8: Vortrag
Mittwoch, 25. März 2015, 16:15–16:30, C/kHS
Electronic pertubation during high-order harmonic generation from water droplets — •Heiko G. Kurz1,2, Martin Kretschmar1,2, Tamas Nagy1, Detlev Ristau1,2,3, Manfred Lein2,4, Uwe Morgner1,2,3, and Milutin Kovacev1,2 — 1Leibniz Universität Hannover, Institut für Quantenoptik, Welfengarten 1, Hannover — 2QUEST, Centre for Quantum Engineering and Space-Time Research, Welfengarten 1, Hannover — 3Laser Zentrum Hannover e.V., Hollerithallee 8, Hannover — 4Leibniz Universität Hannover, Institut für theoretische Physik, Appelstrasse 2, Hannover
We report on the spatial movement of the electron during high-order harmonic generation (HHG). In an in-situ pump-probe measurement with micrometer-sized liquid water droplets, the influence of high-density targets onto HHG is studied. By increasing the density of the target towards mean inter-particle distances matching the excursion distance of the electron, a decrease in the signal of the emitted harmonic radiation is observed. This decrease can be attributed to an increase in the probability of a perturbation of the electron on its trajectory in the continuum, which is induced by neighbouring molecules. This approach allows to follow the electronic movement with Ångstrom spatial resolution, and to probe electronic trajectories during HHG.