Dresden 2011 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 28: Attosecond physics II
A 28.6: Vortrag
Mittwoch, 16. März 2011, 12:00–12:15, BAR 205
High-order harmonic generation by intensity spikes within filamention — •Daniel S. Steingrube1, Emilia Schulz1, Thomas Binhammer2, Mette B. Gaarde3, Arnaud Couairon4, Uwe Morgner1, and Milutin Kovacev1 — 1Leibniz Universität Hannover, Institut für Quantenoptik, Welfengarten 1, D-30167 Hannover, Germany; QUEST, Centre for Quantum Engineering and Space-Time Research, Hannover, Germany — 2VENTEON Laser Technologies GmbH, D-30827 Garbsen, Germany — 3Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001, USA; PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA — 4Centre de Physique Theorique, Ecole Polytechnique, CNRS, F-91128, Palaiseau, France
Few-cycle pulse generation using filamentation for pulse compression has been shown in a number of recent studies. These short and intense pulses can be applied for high-order harmonic generation (HHG) which is a prerequisite to the production of attosecond pulses.
We realized an experimental setup to combine both steps of pulse compression and HHG in a semi-infinite gas cell at atmospheric pressure where the critical power for filamentation is reached. The generation of high-order harmonics directly in the filament shows the occurrence of intensity spikes above the clamping intensity of filamentation. Our results confirm recent theoretical predictions and show a continuous harmonic spectrum in the XUV-spectral range promising for single attosecond pulse generation directly from a filament.