Impurity absorption of light in structures with quantum dots

Abstract

The impurity absorption of light in a quantum dot with a parabolic potential profile is considered within the framework of the model of a zero radius potential in the effective mass approximation. The sensitivity of the effect of position disorder to the size factor at the transition from a quantum well to a quantum dot is revealed. The spectral dependence of the coefficient of impurity absorption of light is investigated with account of the spread in size of quantum dots. It is shown that the account of spread in size results in smearing of discrete absorption lines. The impurity absorption edge depends on the parameters of quantum dots and the depth of the impurity level.