Investigation of linear and nonlinear optical absorption coefficients and refractive index changes of a zigzag quantum well with structure parameters and applied external fields
Abstract
In this study, we have investigated some linear and nonlinear optical properties of GaAs/GaAlAs zigzag quantum
well structures under different electric and magnetic field intensities. We also examined the effect of adjustable
structural parameters as well as width on the optical response of the system. The diagonalization method has
been the tool to numerically solve the effective mass approximation Schr¨odinger equation obtaining the energy
levels and related wave functions needed to evaluate the expressions of linear, third-order nonlinear, and total
optical absorption coefficients and relative refractive index changes derived within the compact density matrix
method. Results show that the optical response becomes blue-shifted with the applied electric and magnetic
fields’ increment.