EFFECTS OF IMAGE POTENTIAL ON ELECTRONIC AND IMPURITY STATES IN QUANTUM-WELLS

The effects of an image potential on the electronic and hydrogenic imp urity states in AlAs/GaAs/AlAs quantum wells are calculated by using v ariational solutions to the effective-mass equation. The results we ha ve obtained show that when the image potential is added the variations of electronic state energy levels and impurity binding energies are s ignificant, especially when the width of the quantum well becomes narr ow. The results also show that the effects of the impurity-ion image p otential on impurity binding energies are much larger than those of th e electron image potential.