High order harmonic generation from solid targets: Towards intense attosecond pulsesA. Tarasevitch and D. von der Linde
Institut für Experimentelle Physik, Universität Duisburg-Essen, 47048 Duisburg, Germany
Experiments and computer simulations on high order harmonic generation (HOHG) from steep plasma gradients using intense femtosecond laser pulses are presented. The importance of the plasma scale length for the efficiency of HOHG is demonstrated. By changing the pump intensity and the target parameters the regime of HOHG can be switched from non-relativistic to relativistic. Simulations show that attosecond pulses should already be present in our experiments in both interaction regimes. Two-color driven harmonic generation is shown to provide a highly efficient way of attosecond pulse production.
© EDP Sciences, Springer-Verlag 2009