Jz. Kaminski et F. Ehlotzky, PHASE-DEPENDENT SIDELOBES IN HIGH-ORDER ABOVE-THRESHOLD IONIZATION INA BICHROMATIC LASER FIELD, Journal of physics. B, Atomic molecular and optical physics, 30(24), 1997, pp. 5729-5735
We investigate the recently observed sidelobes in the angular distribu
tion of high-order above-threshold ionization (ATI) by placing an atom
in a bichromatic laser field of frequencies omega and 2 omega where b
oth components have a relative phase phi. Using an improved Keldysh-Fa
isal-Reiss (KFR) model, in which the Coulomb effects of the parent ion
s are taken into account, we show that even for a second field of very
low intensity, drastic changes in the angular distributions occur as
a function of the phase phi. Relations of our work to previous investi
gations are established.