FAR-INFRARED MAGNETO-OPTICAL TRANSITIONS IN SELF-ASSEMBLED SEMICONDUCTOR QUANTUM-RINGS

The oscillator strength for magneto-optical transitions in the far-infrared spectral region is investigated considering one-electron states in a semiconductor quantum-ring (QR) nanostructure subjected to a constant external magnetic field. We analytically solve the stationary Schrodinger equation by applying hard-wall confinement conditions to a model system of the QR using the cylindrical geometry. The energy levels of this model system are calculated after solving the secular equation in a way that is independent of the particular material involved. The approach permits us to obtain universal results in the above sense. Dipole-allowed magneto-optical transitions are studied by calculating their oscillator-strength. We also analyze the persistent current due to the magnetic flux threaded by the QR. The results obtained are discussed in detail and comparison with previous works on this subject are made.