Spectral hole burning in self-organized quantum dots

Accumulated spectral hole burning is demonstrated for self-organized InAs/GaAs quantum dots (QDs) embedded in the space-charge region of a p–i–n diode. In two-color experiments, selective charging of QDs by resonant optical excitation is proved. A hole storage time of View the MathML source leads to saturation densities of only View the MathML source. The results show the potential of inhomogeneously broadened ensembles of self-organized QDs for parallel optical storage. Additionally, spectral hole burning is used to identify the positive trion and to estimate the trion binding energy.