ИСТИНА

Here we present the results of computer simulations on interaction of Ag and Ar atoms with two-color laser field formed by the fundamental and second harmonic of Ti:Sapphire laser. The obtained results show that in the case of the two-color laser field the HHG spectra strongly depend on the parameters of irradiating pulses. The main control parameters are: (a) the relative orientation of polarization vectors of linear polarized laser pulses at basic frequency and second harmonic; (b) the delay time between pulses, (c) the pulse temporal widths, (d) their intensities, (e) chirp of pulses. The influence of these parameters on the emission spectra is discussed and illustrated. It is shown that HHG efficiency non-linearly depends on the angle between the polarizations of the two-color laser field components. Moreover, numerical simulations shows that chirp of the fundamental frequency leads to the harmonic shifting, which is correspond to the latest experimental results.