ELECTRIC-FIELD EFFECTS ON SHALLOW DONOR IMPURITIES 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 ap proximation within the strong confinement regime. It is shown that the transition energies between the ground state and the low-lying excite d states decrease with increasing electric field strength. The results also indicate that the transition energy allowed for left circular li ght polarization increases with increasing magnetic field strength, wh ile the transition energy allowed for right circular light polarizatio n decreases with increasing magnetic field strength.