Nonlinear transport of three-dimensional electron gases under the influence of an intense terahertz radiation

We present a detailed theoretical and numerical investigation on nonlinear transport of a model three-dimensional electron gas driven by an intense te rahertz (THz) radiation at lattice temperature T = 10, 77, 300 K using the conventional and recently developed balance-equation approach. Ionized-impu rity, acoustic-phonon and polar optical-phonon scatterings were taken into account for electrons in a single parabolic band. The heating of electrons and the suppression of the de electron mobility by the irradiation of the i ntense THz field are predicted. We find that the de average mobility of ele ctrons peaks around a certain value of the amplitude of the ac field at low lattice temperature.