The Role of Plasma Kinetic Processes during High Intense THz Pulses Generation

Tunable THz Pulses Generation in Non-Equilibrium Magnetized Plasma: The Role of Plasma Kinetics

“…The intensity of fundamental harmonic is about 3.3•10 13 W/cm 2 (for the 2nd harmonic this value was four times less), pulse duration is about 100 fs, phase shift between the harmonics is π/2. Under the action of such a pulse as a result of tunnel ionization of atoms [26,27] the plasma with ionization degree of about 2.7•10 −4 can be formed which leads to the electron concentration about N e 7•10 15 cm −3 [25]. Here we suppose that during the fs-laser pulse action the gas temperature doesn't change.…”

“…It will be shown that by applying static magnetic field, we are able to produce two-frequency tunable THz source with varying bandwidth which is sensitive to the velocity distribution function as well as the velocity dependence of the transport cross section in gas. Recently such a theoretical study was done for the case of nonmagnetic nonequilibrium two-color plasma [25] based on the dispersive equation solution for longitudinal oscillations within the framework of elementary and kinetic models of plasma volume. The principal scheme we are going to consider is presented in Figure 1.…”