Abstract
Linear and third-order nonlinear absorption coefficients have been theoretically investigated in a system of vertically coupled cylindrical double quantum dots with the modified Pöschl-Teller potential in the axial direction and parabolic potential in the radial direction. Also, changes in the refractive index in these conditions were obtained. For intraband optical transitions of charge carriers in such system the selection rules have been obtained. The behaviour of the linear, nonlinear and total absorption spectra and changes in the refractive index have been theoretically observed for different lattice temperatures and illustrated by the corresponding graphs for two temperatures.
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