Experimental study of harmonic generation from solid surfaces irradiated by multipicosecond laser pulses.
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.
Ganeev
R A
RA
NPO Akadempribor, Tashkent 700 143, Uzbekistan.
Chakera
J A
JA
Raghuramaiah
M
M
Sharma
A K
AK
Naik
P A
PA
Gupta
P D
PD