2nd-harmonic light generation in the interaction of laser-beams with undercritical plasmas
Authors: Batani D., Giulietti A., Biancalana V., Bianconi F., Borghesi M., Chessa P., Giulietti D., Gizzi LA., Deha I., Schifano E.
Autors Affiliation: Univ Milan, Dipartimento Fis, I-20133 Milan, Italy;
CNR, Ist Fis Atom & Molec, via Giardino 7, I-56127 Pisa, Italy;
Univ Pisa, Dipartimento Fis, Piazza Torricelli 2, Pisa, Italy;
Abstract: The process of second harmonic generation (SHG) in undercritical plasmas is studied. It is shown that filamentation and self-focusing of the laser beam in the plasma can break the plasma density symmetry and lead to SHG by free electrons. In turn, second harmonic emission may be used to investigate the plasma parameters and to diagnose the process of laser beam filamentation itself.
Journal/Review: PHYSICS ESSAYS
Volume: 7 (1) Pages from: 87 to: 94