The effects of Cup-like and Hill-like Parabolic Confining Potentials on the Photoionization Cross Section in a Spheroidal Quantum Dot

摘要

A theoretical investigation of the effects of the hill-like and the cup-like electric confining potentials, both parabolic and superimposed on an infinite spherical square well (ISSW) potential, on the photoionization cross section (PCS) in a spheroidal quantum dot is presented. As the cup-like parabolic potential intensifies, the peak of the PCS becomes red-shifted for the s → p transition, and becomes blue-shifted for the p → d, d → f (and so forth) transitions. The hill-like potential, on the contrary, blue shifts the peaks of the PCS for the s → p transitions, while it red-shifts those of transitions between higher states. Consequently, the two potentials discriminate between transitions involving the ground states and those involving higher states.