Electric-field effects on shallow donor impurity in a harmonic quantum dot

Electric-field effects on shallow donor impurity states in a harmonic quantum dot are investigated theoretically using the effective-mass approximation within the strong confinement regime. It is shown that the transition energies between the ground state and the low-lying excited states shrink with enhancement of electric field strength. The results also indicate that the transition energy allowed for left circular light polarization increases with enhancement of magnetic field strength, while the transition energy allowed for right circular light polarization decreases with increasing magnetic field strength. (author). 26 refs, 3 figs