Dynamics of optically stored charges in InGaAs quantum dots

We investigate a charge storage device based on InGaAs quantum dots, that utilizes optical charge generation and readout of the stored charge distribution. A detailed analysis of the temporal evolution of the charge storage spectra is presented as a function of lattice temperature. Persistent View the MathML source wavelength selective storage of electrons is demonstrated for temperatures up to View the MathML source. Resonantly stored holes are found to thermally redistribute among the quantum dot ensemble for View the MathML source over microsecond timescales. Our results provide new insight into the dynamics of resonantly stored charge and the temperature-induced modifications of the absorption process for self-assembled quantum dots.