Dependence phase at two color problem in inert gas and attosecond pulses

In this study, the variation of quasienergy spectrum of Argon which exposed to 800 nm, 1200 nm and 1300 nm fundamental field and its third harmonic, with respect to the phase between two fields is investigated. To generalise the results the problem is extent to Helium atom in 390 nm and 800 nm fundamental fields together their third harmonics.The main reason to study this problem is the expected variation of quasienergy spectrum and therefore the ionisation rate with respect to phase difference between two fields, which has implication on the production of Attosecond pulses.