Figure 9.

The total (solid line), linear (dashed line), and nonlinear (dotted line) optical absorption coefficient (a,b), and the total (solid line), linear (dashed line), and nonlinear (dotted line) relative changes in the refractive index coefficient (c,d) as functions of the incident photon energy in a ZnS/CdS/ZnS spherical core/shell/shell quantum dot, for three values of the magnetic field: zero (red line), 20 T (blue line), and 30 T (black line). The results are without (a,c) and with (b,d) donor impurity at the center in the QD. Calculations are with $R_1=4$ nm, $R_2=11$ nm, and $R_3=12$ nm. The optical transition is between the states $|1\rangle \to |2\rangle$, with $m=0$ and without external electric field effects.