High-harmonic Generation from Solid Surface Using an Oscillating Mirror Model and Plasma Mirror System for High Contrast Laser Pulse

Abstract

High-order harmonic generation from a solid surface affected by the contrast, of a laser pulse, was studied using an oscillating mirror model. High-order harmonics generated from solid surfaces have unusual properties such as spectral redshift, and an intensity difference between even- and odd-order harmonics which is not reported for high-order harmonics generated by a gas medium. We confirmed that high-order harmonics from solid surfaces have selectivity of polarization as well as cut-off extensional and the enhancement of conversion efficiency proportional to laser intensity. And the principle of operation and the characteristics of a, plasma, mirror system developed for achieving high contrast laser pulses to pursue the experimental realization of high-harmonic generation from solid surfaces are reported. Energy fluence on the plasma mirrors is tunable between 10 J/cm(2) and 1000 J/cm(2) and a,round 1000 shots are available before the plasma, mirrors require replacement.