Effects of external parameters on the nonlinear optical absorption of GaAs/Ga0.7Al0.3As quantum dots: Insights from like-modified Kratzer plus Coulomb potential

Abstract

The investigation focuses on the inter-subband nonlinear optical properties of a spherical quantum dot system using the like-modified Kratzer plus Coulomb potential as the research model. By employing density matrix theory and the Nikiforov-Uvarov method, a detailed study is conducted on the linear, third-order nonlinearity, and total optical absorption coefficients. Observations show that the controllable effective mass, the quantum size parameter and the confining potential parameter all affect the optical absorption coefficient to a greater or lesser extent. Of particular importance is the fact that these factors have a significant modulating effect on the magnitude of the peak of the optical absorption coefficient and the position of its resonance peak.