Simultaneous measurements of hard X rays and second-harmonic emission in fs laser-target interactions
Authors: Gizzi LA., Giulietti D., Giulietti A., Audebert P., Bastiani S., Geindre JP., Mysyrowicz A.
Autors Affiliation: Ecole polytech ENSTA, Lab Opt Appl, F-91120 Palaiseau, France;
CNR Ist TESRE, I-40129 Bologna, Italy;
Univ Pisa, Dip Fisica, I-56100 Pisa Italy;
Ecole polytech, Lab utilisat laser instense, Fì91128 Palaiseau, France
Abstract: The interaction of 150 fs laser pulses with very thin plastic targets at an intensity of 5 X 10(17) W/cm(2) was investigated experimentally. Second-harmonic (SH) radiation was found to be emitted only in the specular direction. Both SH intensity and hard x-ray yield were found to be strongly dependent upon the laser polarization. The main features of SH emission are in agreement with a theoretical model which assumes resonance absorption as the source mechanism of electron plasma waves. Measurements suggest that, in conditions of maximum energy absorption, wave breaking of resonantly excited electron plasma waves takes place.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 76 (13) Pages from: 2278 to: 2281
KeyWords: femtosecond laser; generation; absorption; plasmas; pulsesDOI: 10.1103/PhysRevLett.76.2278Citations: 79data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-07-25References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here