Calculations of high-order-harmonic generation in the strongly ionizing regime.

摘要: Harmonic spectra have been calculated by numerically integrating the one-dimensional Schr\"odinger equation for a model potential and laser field sufficiently intense to cause significant or complete ionization. The use of allows realistic pulse lengths (1 ps) wavelengths (0.5 1 \ensuremath{\mu}m) be considered. dependence plateau cutoff on intensity has studied in detail, from far below above saturation intensity. We find that scales approximately linearly with intensity, continues increase beyond saturation, although at slower rate. At high intensities, where ionization occurs rapidly during leading edge pulse, becomes less clearly defined. In this regime, harmonic will determined combination atomic response phase mismatch due presence free electrons.