Nonlinear optical rectification and the second and third harmonic generation in Pöschl–Teller quantum well under the intense laser field

In this work, the effect of a non-resonant intense laser field on the optical rectification and second and third harmonic generation in a Pöschl–Teller quantum well is theoretically investigated. In this regard, the coefficients of nonlinear optical rectification and second and third harmonic generation are obtained by using the compact-density matrix approach and an iterative method. Different values of the asymmetry parameters of the Pöschl–Teller potential as well as intense laser field strength have been considered. Numerical results presented for a typical GaAs quantum wells show that higher-order optical effects are considerably sensitive to intense laser field and can be adjusted by a correct choice of asymmetry parameters of the potential.

► Higher-order optical effects are considerably sensitive to the intense laser field.
► Increasing ILF shifts the maximum peaks of NOR, SHG and THG toward higher-energies.
► NOR and SHG increase with an enhancement in the asymmetry of the quantum well.
► Nonlinearities can be adjusted by a correct choice of asymmetry parameters.