Terahertz radiation in laser-induced charge separation in the irradiated plasma target

Irradiation of a thin target by an intense laser pulse makes it possible to produce both bulk and surface terahertz (THz) pulses as a result of their generation by a bunch of fast electrons leaving the target and/or by a moving front of the spatial charge separation of expanding plasma. These mechanisms responsible for generating bulk and surface THz radiation are refined and compared. The dependence of the parameters of the generated THz radiation on the laser pulse energy, focal spot size and duration is found.