Influence of laser contrast on high-order harmonic generation from solid-density plasma surfaces

Abstract

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Double optimal density gradients for harmonic generation from relativistically oscillating plasma surfaces

“…The influence of L on harmonics of the coherent wake emission (CWE) mechanism 30 was investigated experimentally and numerically in our previous research. 31 It was found that there is an optimal L opt for CWE harmonics around L ¼ 0:1k. In this article, we concentrate on the effect of L on ROM harmonics (H > 20th).…”

Analysis of Lyα Dielectronic Satellites to Characterize Temporal Profile of Intense Femtosecond Laser Pulses

“…Presence of quite a high prepulse significantly decreases the average degree of ionization in irradiated solid-state target. Investigations of high-order harmonic generation during solid-density plasma surfaces interaction described in [4] show that the use of plasma mirrors (a widely known way to improve the contrast, for details see [5]) allows us to improve the efficiency of the coherent wake emission mechanism [6]. For this reason, it is crucially important to have an opportunity to monitor a temporal profile of laser pulses applied for experiments.…”