Abstract
In this paper, I present a detailed theoretical study of electron-photon-phonon interactions in three-dimensional electron gases (3DEGs) subjected to linearly polarized intense electromagnetic (EM) radiations. Applying the solution of the time-dependent Schrödinger equation, in which the effect of the EM radiation field is included exactly, to time-dependent perturbation theory, I have developed a novel approach for determining the probabilities of steady-state electronic transitions induced by electron-photon-phonon interactions in a 3DEG system. For the case of polar semiconductors, I have discussed the influence of the linearly polarized intense laser radiation on the electronic scattering rate for electron interactions with the radiation field and with the LO phonons. These results are pertinent to the application of recently developed terahertz or far-infrared laser sources such as free-electron lasers.
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