S. Varro et F. Ehlotzky, HIGHER HARMONIC-GENERATION AT METAL-SURFACES BY POWERFUL BICHROMATIC LASER FIELDS, Physical review. A, 56(3), 1997, pp. 2439-2442
We generalize our recent model calculations on the generation of highe
r harmonics at metal surfaces by a powerful femtosecond laser pulse [P
hys. Rev. A 54, 3245 (1996)] for the case in which a bichromatic field
of frequencies omega and 2 omega is applied, where both components ar
e out of phase by an angle phi, and we discuss the coherent phase cont
rol of the harmonic generation process, relating our results to those
obtained for harmonic generation by shining a bichromatic laser field
on atoms.