Laser induced magneto-Raman optical gain of an exciton and a biexciton in a CdTe/ZnTe quantum dot

Magnetic field and laser field amplitude dependent electronic and optical properties of exciton and biexciton in a CdTe/ZnTe quantum dot nanostructure are brought out taking into account the spatial confinement effect. Binding energies of exciton and biexciton as functions of laser field amplitude and magnetic field strength are computed in a CdTe/ZnTe quantum dot for the constant dot radius 30 Å. Oscillator strength, resonant absorption coefficients and resonant optical Raman intensity of the exciton and biexciton as a function of laser field amplitude are obtained in the presence of magnetic field strength in a CdTe/ZnTe quantum dot. The laser field induced magneto-Raman gain is studied for a constant dot radii. The Coulomb interaction energy which is involved in Hartree potential is obtained numerically. The result shows that the applications of magnetic field strength and the laser field amplitude alter the electronic and optical properties considerably in the CdTe/ZnTe quantum dot.