Optical second harmonic generation of tunable spherical quantum dots under Inversely Quadratic Hellmann Plus Inversely Quadratic Potential

Abstract

Herein, we employ the effective mass approximation and the iterative method to investigate the Second harmonic generation (SHG) coefficient of a spherical quantum dot (QD) system with Inversely Quadratic Hellmann Plus Inversely Quadratic Potential (IQHIQP), considering the regulation of the quantum size, confinement potential depth and external environment. The numerical simulation results show that the SHG coefficient is highly reliant on the tunable factor, which can affect the energy level interval and dipole moment elements. Interestingly, the effect of temperature on the SHG coefficient in terms of peak location and size is consistent with the quantum dot radius but opposite to the hydrostatic pressure. Therefore, it is necessary to pay more attention to the influence of internal and external parameters on nonlinear optical effects, and apply the theory to practical experiments and the manufacture of optoelectronic devices.