Quantum-confined Stark effect on Landau levels in GaAs low-dimensional systems

We consider the electronic structure of the cylindrical pills of GaAs low-dimensional systems in an unusual field regime, namely, in the presence of an electric field in radial direction and a crossed magnetic field applied in the axial direction. Effects of the competition between the magnetic radial confinement and the electric field induced polarization on the el-hhl transition energy are studied in detail. The results show that the energies of electron and hole states depend sensitively on the dot radius and the relative magnitude of the electric field to the magnetic field. These aspects must be taken into account in the understanding of optical phenomena related to energy spectrum of the carriers in the presence of the external fields and the designing materials and devices in low-dimensional systems