Effect of laser radiation on optical properties of disk shaped quantum dot in magnetic fields

The optical absorption coefficients and changes in the refractive index in GaAs/AlGaAs, disk shaped quantum dots (DSQD) with simultaneously applied laser and magnetic field are studied in detail. The use of the density matrix formalism is made to study the variations in linear and non-linear polarizability with the frequency of the electric field. It is found that the absorption coefficient and the refractive index changes depend not only on the optical wave but also on the strength of the static magnetic field.

► Absorption coefficients and refractive index changes of a disk shaped quantum dot are calculated. ► Absorption coefficients and refractive index changes are found to depend on laser parameters. ► The magnetic field plays an important role.