Photoluminescence of charged InAs self-assembled quantum dots

This is the authors' abstract. We don't add key points for this paper.

We have used capacitance and photoluminescence spectroscopy to study the optical properties of charged InAs self-assembled quantum dots. When the dots are loaded with electrons, the ground-state transition in the photoluminescence spectra shows a redshift of about 15 meV accompanied by a decrease in intensity and a broadening. In addition, an excited-state transition appears. All the observations mentioned above are attributed to many-body effects caused by charging of the quantum dots with electrons. The observed changes of the photoluminescence signal are also discussed in terms of field effects.