Polarization of atoms by simultaneous electromagnetic pulses of different frequency ranges

A method is proposed for the fast and deep polarization of a system of ground-state hyperfine sublevels of an atom having an optical excited level or a system of excited-state sublevels. The method is based on the simultaneous action of pulsed bichromatic resonance fields of optical and microwave ranges. The scheme of the ground-state sublevel polarization by bichromatic or monochromatic microwave fields is also considered.