Self-consistent calculation and analysis of the optical properties and modulated doping in GaAs/AlGaAs quantum wells

Abstract

ABSTRACT: In this work, physics characterization and analysis of a GaAs quantum well with AlGaAs barriers is carried out, considering an interior doped layer. An analysis of the probability density, the energy spectrum, and the electronic density has been carried out, solving in a self-consistent way the Schrödinger, Poisson, and charge neutrality equations. Between the characterization, the system response under geometric changes in the well width and non-geometric changes such as the position and doped layer width and the donor’s density were reviewed. All the second-order differential equations have been solved using the finitedifference method. Finally, with the obtained wave functions and energies, the optical absorption coefficient and the electromagnetically induced transparency between the first three confined states have been calculated. The results show the possibility of tuning the optical absorption coefficient and the electromagnetically induced transparency via changes in the system geometry and doped layer characteristics.