Iterative density matrix revisited: Excitonic phenomena on the InAs quantum well as a saturable absorber

Abstract

By solving the Liouville equation, third-order nonlinear terms of the optical absorptive two quantum-level system are obtained through iterative density matrix calculations. In the improved model, the full frequency range is taken into account instead of just the weak absorptive limit. he process investigated in this study can be likened to saturation fitting for heavy-hole excitons in the InAs quantum well. Additionally, we demonstrate that the iterative method used for analyzing band-to-band excitonic spectra enables easy retrieval of the static dielectric constant.

Keywords

• Exciton
• Dielectric constant
• InAs quantum well
• Density matrix approach
• Third-order nonlinear absorption