Nonlinear optical rectification of tuned quantum dots under the action of a vertical magnetic field

Abstract

The changes of optical rectification (OR) coefficient in tuned quantum dots under the action of the external magnetic field, hydrostatic pressure, temperature and quantum dot radius are theoretically studied in detail. The tuned quantum dots are subjected to a uniform magnetic field perpendicular to the structural plane. Within the framework of effective mass approximation and parabolic band approximation, the energy level and wave function are derived, and the nonlinear OR coefficient is calculated by compact density matrix theory and iterative method. Numerical results show that the resonance peak of the OR coefficient moves in the direction of high energy or low energy under different constraint parameters, that is, red shift or blue shift. At the same time, the peak value of the OR coefficient will increase or decrease with the change of the parameters.