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2004 | 106 | 2 | 185-192
Article title

Optical Orientation of Trions in Charge-Tunable InAs/GaAs Quantum Dots

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EN
Abstracts
EN
We report on optical orientation of excitons and trions (singly charged exciton) in individual charge-tunable self-assembled InAs/GaAs quantum dots. When the number of electrons varies from 0 to 2, the trion photoluminescence under quasi-resonant excitation gets progressively polarized from zero to ≈100%. We discuss this behavior as the efficient quenching of exciton spin quantum beats in anisotropic quantum dots due to the trion formation. This result indicates a long hole-spin relaxation time larger than the radiative lifetime, confirmed by time-resolved photoluminescence measurements carried out on a quantum dots ensemble.
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author
  • Laboratoire de Photonique et Nanostructures-CNRS, Route de Nozay, 91460 Marcoussis, France
author
  • Laboratoire de Photonique et Nanostructures-CNRS, Route de Nozay, 91460 Marcoussis, France
author
  • Laboratoire de Photonique et Nanostructures-CNRS, Route de Nozay, 91460 Marcoussis, France
author
  • Laboratoire de Photonique et Nanostructures-CNRS, Route de Nozay, 91460 Marcoussis, France
author
  • Laboratoire de Magnétisme, Nanophysique et Optoélectronique, INSA, 135 Avenue de Rangueil, 31077 Toulouse Cedex, France
author
  • Laboratoire de Magnétisme, Nanophysique et Optoélectronique, INSA, 135 Avenue de Rangueil, 31077 Toulouse Cedex, France
author
  • Laboratoire de Magnétisme, Nanophysique et Optoélectronique, INSA, 135 Avenue de Rangueil, 31077 Toulouse Cedex, France
author
  • Laboratoire de Photonique et Nanostructures-CNRS, Route de Nozay, 91460 Marcoussis, France
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv106n204kz
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