Energy spectrum and interlevel transitions within the conduction band of a D+ 2 complex confined in a spherical quantum dot

Abstract

In this work, we have performed a theoretically study on the energy spectrum, binding energy and interlevel transitions within the conduction band of a D+ 2 complex confined in a spherical quantum dot with finite confinement potential by using diagonalization method within the effective mass approximation. We analyzed the effect of the quantum dot size and internuclear distance on the binding energy, equilibrium distance and optical response of the singly ionized double donor complex. Theoretical analysis of the D+ 2 system indicated that the internuclear distance significantly affects the energy difference between the two lowest-lying electron states and amplitude of the interlevel transitions within the conduction band. In general, the internuclear distance and quantum dot size dependence of the energy states of the D+ 2 complex in a quantum dot shows that the optical sensitivity of a quasi-two-level system can be tuned as desired.