Stuttgart 2012 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
A: Fachverband Atomphysik
A 31: Interaction with strong or short laser pulses IV
A 31.6: Talk
Thursday, March 15, 2012, 12:00–12:15, V57.05
Parametric studies of high-order harmonic generation in liquid water droplets — •H. G. Kurz1,2, D. S. Steingrube1,2, D. Ristau2,3, M. Lein4, U. Morgner1,2,3, and M. Kovačev1,2 — 1Leibniz Universität Hannover, Institut für Quantenoptik, Welfengarten 1, D-30167 Hannover — 2QUEST - Centre for Quantum Engineering and Space-Time Research, Welfengarten 1, D-30167 Hannover — 3Laser Zentrum Hannover e.V., Hollerithallee 8, D-30419 Hannover — 4Leibniz Universität Hannover, Institut für theoretische Physik, Appelstrasse 2, D-30167 Hannover
We report on high-order harmonic generation (HHG) in micrometer-sized liquid water droplets under vacuum condition. A chirped pulse amplification laser system delivers 100 fs-pulses with energies up to 5 mJ for HHG in an ensemble of emitters. The coherent sum of all emitters within the droplet forms the harmonic signal. Therefore, macroscopic effects have to be taken into account. To maximize the harmonic yield, the phases of all these emitters have to be matched. The influence of phase-matching aspects onto HHG are demonstrated by different parameters. Additionally, a pump-probe setup allows for the observation of the spatiotemporal evolution of the target. When the droplet is hit by the pump pulse it starts evaporating, while the probe pulse creates the harmonic radiation. Thus, different pump-probe time delays give access to different states of the target during HHG. Results of phase-matching experiments and the spatiotemporal evolution of the target will be presented.