“…By choosing different potentials and using different methods, the bound states of these systems and also optical processes which is including both the linear and nonlinear properties based on transitions between the bound states have been intensively researched and are still being investigated. Due to the recent advances in material growth techniques, that enable possible to growth of semiconductor QWs with different confinement potentials, in addition to the well-known profiles such as rectangular, square, parabolic, semi-parabolic, and inverse parabolic single or double QWs with the shaped of symmetric and/or asymmetric under the external applied fields [1], [2], [3], [4], [5], [6], [7], respectively, the more realistic potentials such as Tietz-Hua, Morse, and Gaussian [8], [9], [10], [11] etc. have been produced, studied, and researches are still ongoing.…”