Elastic scattering dynamics of cavity polaritons: Evidence for time-energy uncertainty and polariton localization

Wolfgang Werner Langbein, Jørn Märcher Hvam

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Abstract

The directional dynamics of the resonant Rayleigh scattering from a semiconductor microcavity is investigated. When optically exciting the lower polariton branch, the strong dispersion results in a directional emission on a ring. The coherent emission ring shows a reduction of its angular width for increasing time after excitation, giving direct evidence for the time-energy uncertainty in the dynamics of the scattering by disorder. The ring width converges with time to a finite value, a direct measure of an intrinsic momentum broadening of the polariton states localized by multiple disorder scattering.
Original languageEnglish
JournalPhysical Review Letters
Volume88
Issue number4
Pages (from-to)047401
ISSN0031-9007
DOIs
Publication statusPublished - 2002

Bibliographical note

Copyright (2002) American Physical Society

Keywords

  • DISORDERED-SYSTEMS
  • SEMICONDUCTOR MICROCAVITY
  • QUANTUM-WELL STRUCTURES
  • RESONANT RAYLEIGH-SCATTERING
  • COHERENCE
  • EXCITONS

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