Nonlinear optical rectification of GaAs/Ga_1–x Al _x As quantum dots with Hulth-en plus Hellmann confining potential

Abstract

In this work, we have studied the nonlinear optical rectification (NOR) of spherical quantum dots (QDs) under Hulth´en plus Hellmann (HPH) confining potential with the external tuning elements. Energy and wavefunction have been determined with the help of the Nikiforov-Uvarov (NU) method. Expression for the NOR coefficient is derived by the density matrix theory. The results show that the applied external elements and internal parameters of this system have a strong influence on intraband nonlinear optical properties. It is hoped that this tuning of the nonlinear optical properties of GaAs/Ga1-x Al x As QDs can make a greater contribution to the preparation of new functional optical devices.