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Circularly Polarized Emission from Ensembles of InGaAs/GaAs Quantum Rings

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Abstract

Magneto-photoluminescence spectroscopy measurements were performed on self-assembled InGaAs/GaAs quantum rings. We report exciton exchange energy as a function of interband emission energy; we measure a decrease from 163 μ e V to 43 μ e V in the range of 1.30 eV to 1.40 eV. This result is remarkable and compatible with the exciton exchange energy in self-assembled InAs/GaAs quantum dots. Our results reveal the high value of exciton exchange albeit the quantum rings shape. We show that the exciton energy is sensitive to a magnetic field.

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Authors and Affiliations

  1. Laboratoire matériaux, molécules et Applications, Institut Préparatoire aux Etudes Scientifiques et Techniques, Université Carthage, La Marsa 2075, Tunis, Tunisia

    R. Naouari, W. Ouerghi & M. A. Maaref

  2. Institut de Nanosciences de Paris, Université de Pierre Marie Curie, Unité mixte de recherche, 7588-CNRS-UPMC, France

    F. Bernardot & C. Testelin

  3. Instituto de Ciencia de los Materials, Universidad de Valencia, P. O. Box 22085, 46071, Valencia, Spain

    J. Martinez-Pastor

  4. Instituto de Microelectrónica de Madrid, Isaac Newton 8, 28760 Tres Cantos, Madrid, Spain

    D. Granados & J. M. Garcia

Authors
  1. R. Naouari
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  2. W. Ouerghi
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  3. F. Bernardot
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  4. C. Testelin
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  5. M. A. Maaref
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  6. J. Martinez-Pastor
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  7. D. Granados
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  8. J. M. Garcia
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Correspondence to R. Naouari.

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Naouari, R., Ouerghi, W., Bernardot, F. et al. Circularly Polarized Emission from Ensembles of InGaAs/GaAs Quantum Rings. Silicon 9, 689–693 (2017). https://doi.org/10.1007/s12633-015-9388-2

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  • DOI: https://doi.org/10.1007/s12633-015-9388-2

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