Optical susceptibility of a confined magneto-LO-polaron in a strained GaAs0.9P0.1/GaAs0.6P0.4 quantum dot

•Magneto-LO-polaron in a cylindrical GaAs0.9P0.1/GaAs0.6P0.4 quantum dot is studied.•Nonlinear optical properties are investigated using compact density matrix method.•Optical susceptibilities of generation of second and third harmonic are investigated.•The nonlinear optical properties have influence on the effects of geometrical confinement and phonon.

Magneto-LO-polaron in a cylindrical GaAs0.9P0.1/GaAs0.6P0.4 quantum dot is studied taking into consideration of geometrical confinement. The effect of phonon on the exciton binding energy is computed applying variational method within the single band effective mass approximation numerically. And the nonlinear optical properties with the incident photon energy are investigated in the presence of magnetic field strength and the phonon effect using compact density matrix method. Optical susceptibilities of generation of second and third harmonic as a function of incident energy for a confined exciton in the presence of magnetic field strength in a GaAsP quantum dot with and without the phonon effect are carried out. Our results show that the second and third harmonic generations have influence on the effects of geometrical confinement, the phonon and the magnetic field strength.