Abstract
•Intersubband transition in CdTe/ZnTe core/shell prolate spheroidal quntum dots.•Third-order nonlinear optical susceptibility.•The Third-nonlinear optical susceptibility shifts with the variation of core, the average shell thickness and eccentricity.
In this paper, we have reported a more realistic model simulating the electronic and nonlinear optical properties in CdTe/ZnTe core/shell materials and inverted structure. In this model, we assume a prolate spheroidal shape for the considered nanostructure. The electronic band structure and the set of the wave functions were calculated by solving the Schrödinger Equation in the frame of the Effective Mass Approximation EMA and taking in consideration the Compact Density Matrix. The effects of the size and the eccentricity e on the third-order nonlinear optical susceptibility χ3 are investigated. It was found that χ3 is strongly affected by the size of core /shell prolate spheroid quantum dots (CSPSQDs) and the eccentricity e. Indeed, a spectacular red shift of peaks of χ3 was conspicuous in addition to their intensification.