Optical properties of arrays of quantum dots with internal disorder
E.V. Tsiper
Department of Physics, University of Utah, Salt Lake City, Utah 84112
Optical properties of large arrays of isolated quantum dots are
discussed in order to interpret the existent photoluminescence
data. The presented theory explains the large observed shift between
the lowest emission and absorption energies as the average distance
between the ground and first excited states of the dots. The line
shape of the spectra is calculated for the case when the fluctuations
of the energy levels in quantum dots are due to the alloy composition
fluctuations. The calculated line shape is in good agreement with the
experimental data. The influence of fluctuations of the shape of
quantum dots on the photoluminescence spectra is also discussed.