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Preservation of quantum coherence after exciton-exciton interaction in quantum wells

N. Garro, S. P. Kennedy, R. T. Phillips, G. Aichmayr, U. Rössler, and L. Viña
Phys. Rev. B 67, 121302(R) – Published 17 March 2003
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Abstract

The dynamics of exciton-exciton interaction in quantum wells has been investigated by monitoring the time-resolved resonant secondary emission that follows excitation with linearly and circularly polarized light. Preservation of quantum beating in the cross-polarized emission demonstrates that spin relaxation can take place, for some scattering channels, without total quantum coherence loss. Interexciton electron exchange is the scattering mechanism that explains the persistence of the beating and, since it is sensitive to the fine structure of excitons, the shift by π in the phase of the beating observed in the experiment.

  • Received 14 October 2002

DOI:https://doi.org/10.1103/PhysRevB.67.121302

©2003 American Physical Society

Authors & Affiliations

N. Garro1,2, S. P. Kennedy1, R. T. Phillips1, G. Aichmayr3,*, U. Rössler3,†, and L. Viña3

  • 1Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, United Kingdom
  • 2Institut de Ciència dels Materials, Universitat de València, E-46071 València, Spain
  • 3Departamento Física de Materiales, Universidad Autónoma Madrid, E-28049 Madrid, Spain

  • *Present address: Infineon Technologies, Koenigsbruecker Street 180, D-01099, Dresden, Germany.
  • Permanent address: Institut für Theoretische Physik, Universität at Regensburg, D-92040 Regensburg, Germany.

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Vol. 67, Iss. 12 — 15 March 2003

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