Selective optical pumping of charged excitons in unintentionally doped InAs quantum dots.

@article{MuozMatutano2008SelectiveOP,
  title={Selective optical pumping of charged excitons in unintentionally doped InAs quantum dots.},
  author={Guillermo Mu{\~n}oz-Matutano and B Al{\'e}n and J Carlo Martinez-Pastor and Lucca Seravalli and Paola Frigeri and S. Franchi},
  journal={Nanotechnology},
  year={2008},
  volume={19 14},
  pages={145711}
}
We have investigated the selective optical pumping of charged excitonic species in a sample containing quantum dots of different sizes and low areal density by photoluminescence and excitation of the photoluminescence microspectroscopy. We study the selective optical excitation of negatively charged excitons as an alternative to commonly used electrical methods. We demonstrate that under resonant excitation in impurity related bands, the selective pumping efficiency can be as high as 85% in… CONTINUE READING