ИСТИНА

The recent results of investigations on the THz radiation generation in two-color laser field interacting with extended gas media are presented. Basing on the non-perturbative quantum-mechanical description of the THz radiation generated by a single atom and the extended gas model based on the obtained quantum-mechanical information about the amplitudes and phases of the THz radiation projections on the orthogonal axes and effects of propagation of the laser field radiation we have numerically investigated the influence of the laser field parameters and the parameters of the gas on the spectral, integral, polarization and spatial characteristics of the generated radiation. Different schemes of the two-color laser field organizations have been investigated during the current study. The effects of the quasi-phase matching in extended gas have been discussed. Methods on the control over the efficiency and polarization characteristics are presented.