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Polarization Spectroscopy of Charged Single Self-Assembled Quantum Dots

Published online by Cambridge University Press:  01 February 2011

Morgan E. Ware ,
Allan Bracker ,
Daniel Gammon  and
David Gershoni
Morgan E. Ware
Affiliation:
Naval Research Laboratory, Washington, DC 20375
Allan Bracker
Affiliation:
Naval Research Laboratory, Washington, DC 20375
Daniel Gammon
Affiliation:
Naval Research Laboratory, Washington, DC 20375
David Gershoni
Affiliation:
Naval Research Laboratory, Washington, DC 20375
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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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 794: Symposium T – Self-Organized Processes in Semiconductor Heteroepitaxy , 2003 , T6.3/N8.3/Z6.3
Copyright
Copyright © Materials Research Society 2004

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References

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