J. Phys. IV France 11 (2001) Pr2-377-Pr2-380
Effect of the plasma density scale-length on harmonic generation in laser-plasma interactionB. Shuai, R. Li and Z.Z. Xu
Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800, P.R. China
The conversion efficiency of harmonics emitted by laser driven plasma was investigated via PIC (Particle In Cell) simulation. We calculated the efficiencies of harmonics generated in plasma with different scale- lengths irradiated by p-polarized, intense (but still non-relativistic) laser pulses of different durations. We found that the plasma scale-length plays an important role in harmonic generation, but this effect is quite different for different harmonic order, different pulse duration or different plasma density.
© EDP Sciences 2001