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Polarization Spectroscopy of Charged Single Self-Assembled Quantum Dots

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Abstract

We have demonstrated single dot spectroscopy of InAs/GaAs self-assembled quantum dots embedded in a bias controlled Schottky diode. The photoluminescence spectra exhibit discrete lines depending on bias, which we attribute to the recombination of positively charged, neutral, and negatively charged confined excitons. With excitation directly into the dot, large circular polarization memory is exhibited by the two charged exciton (trion) lines. This indicates long spin lifetimes for both the electron and the heavy hole in the quantum dots.

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Acknowledgments

This work was funded in part by DARPA/QUIST, NSA/ARDA, and ONR. MEW holds a National Research Council Research Associateship Award at the Naval Research Laboratory.

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Authors and Affiliations

  1. Naval Research Laboratory, Washington, DC, 20375, USA

    Morgan E. Ware, Allan Bracker & Daniel Gammon

  2. Technion-Israel Institute of Technology, Haifa, 32000, Israel

    David Gershoni

Authors
  1. Morgan E. Ware
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  2. Allan Bracker
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  3. Daniel Gammon
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  4. David Gershoni
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Ware, M.E., Bracker, A., Gammon, D. et al. Polarization Spectroscopy of Charged Single Self-Assembled Quantum Dots. MRS Online Proceedings Library 799, 24–29 (2003). https://doi.org/10.1557/PROC-799-Z6.3/N8/T6.3

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  • DOI: https://doi.org/10.1557/PROC-799-Z6.3/N8/T6.3

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