Impurity absorption of light in structures with quantum dots

The impurity absorption of light in a quantum dot with a parabolic potentia l profile is considered within the framework of the model of a zero radius potential in the effective mass approximation. The sensitivity of the effec t 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 coefficie nt of impurity absorption of light is investigated with account of the spre ad 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 e dge depends on the parameters of quantum dots and the depth of the impurity level. (C) 2001 MAIK "Nauka/Interperiodica".