Nonlinear transport in quasi-two-dimensional systems driven by intense terahertz fields

Publisher Website
Google Scholar
Abstract
A fully nonlinear theoretical study is carried out on electron transport in GaAs-based quasi-two-dimensional systems driven by an intense oscillatory electric field of terahertz (THz) frequency. We consider the role of the two lowest subbands with accurate treatment of intrasubband and intersubband impurity, acoustic phonon, and polar optic-phonon scatterings. The steady oscillating response of the drift velocity and the electron temperature are obtained by directly solving the time-dependent momentum and energy balance equations. The predicted rise of the average electron temperature and the drop of the dc conductivity induced by the THz radiation, are in reasonably good agreement with recent experimental measurements.