Engineering optical properties of double quantum well systems

Abstract

Linear, nonlinear and total absorption coefficient and refractive index changes of double quantum well systems have been studied theoretically in the presence of external magnetic field applied along the growth direction. The analytical expressions for the linear and nonlinear optical properties have been obtained using density matrix method. The optical properties have been studied in detail for various quantum well shapes, e.g., rectangular, triangular and parabolic, and laser parameters. Shape effects play an important role in modifying the response of quantum heterostructures to external fields. The role of asymmetry parameter on quantum well optical properties has been emphasized.