Abstract:
A significant part of the optical spectrum (luminescence) of quantum dots, in the range of the electronic bound states, are narrow lines. The finite widths of these lines, and their shape as well, appear to depend on the properties of quantum dots, properties of the sample, and on the conditions of measurement. Some time ago we paid attention to the question of a continuous background in the luminescence spectra and to a certain broadening (narrowing) of the lines depending on the intensity of excitation of the sample. This time we consider the dependence of the optical linewidth (FWHM) on the lateral size of individual quantum dots and present the relation between experimental data and the theory based on the multiple scattering of electrons on LO phonons.