Abstract
Basing on the Green's function method for the study of disordered systems, we propose a simple model that describes the shift and broadening of excitonic resonance in interface-corrugated quantum wells. This model employs the original microscopic excitonic Hamiltonian and is applicable in a wide region of varying parameters from the sharp resonance to the classical limit. The relaxation frequency and the shift of exciton ground-state resonance are calculated analytically for realistic quantum wells with finite potential barriers and anisotropic effective masses of the electron and hole. It is shown that the type of the excitonic resonance and its line-shape are mainly controlled by the competition between the correlation properties of surface disorder and finite height of potential barriers. (© 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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