title: Experimental study of harmonic generation from solid surfaces irradiated by multipicosecond laser pulses.
abstract: An experimental study is presented on harmonic generation from solid surfaces using 27 ps Nd:glass laser pulses (lambda=1053 nm) in the intensity range of 10(13)-10(15) W cm(-2). Second, third, and fourth harmonics emitted in the specular reflection direction showed intensity scaling exponents of 1.5, 1.8, and 3.8 for an obliquely incident p-polarized laser beam, providing a conversion efficiency of 2x10(-8), 10(-10), and 5x10(-12) at 10(15) W cm(-2), respectively. Second and third harmonic radiation generated using an s-polarized pump was about 10 and 100 times smaller, respectively, compared to that for the p-polarized laser radiation. Faraday rotation observed in the reflected fundamental radiation can explain the relative harmonic yields for the p and s polarizations of the pump beam.
authors: NPO Akadempribor, Tashkent 700 143, Uzbekistan.
authors: R A
authors: RA
authors: Ganeev
authors: J A
authors: JA
authors: Chakera
authors: M
authors: M
authors: Raghuramaiah
authors: A K
authors: AK
authors: Sharma
authors: P A
authors: PA
authors: Naik
authors: P D
authors: PD
authors: Gupta