Cyclotron-Stark-phonon-photon resonances in semiconductor superlattices under terahertz irradiation

Nonlinear transport in biased superlattices subject to both a strong magnet ic held and an intense terahertz irradiation is studied within the density- matrix approach. Intra-collisional held effects of all applied fields are t aken into account. New cyclotron-Stark-phonon-photon resonances in the curr ent are predicted to occur for particular ratios of the Bloch, cyclotron, a nd terahertz frequencies. Electro-phonon resonances that were studied theor etically many years ago are enhanced by a quantizing magnetic field, but we akened by an intense AC electric field in the terahertz domain. (C) 1999 El sevier Science B.V. All rights reserved.