Suppression of the bragg reflection in semiconductor multiple quantum wells by excitation induced dephasing

M. Hübner, J. Kuhl, S. Haas, T. Stroucken, S. W. Koch, R. Hey, K. Ploog

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Time resolved reflectivity measurements of multiple-quantum-well Bragg structures show a strong reduction of the reflectivity at increased excitation levels. At low intensities, a pump-induced contrast of more than 20% in the reflectivity of a 10 quantum well Bragg structure is observed and attributed to the superradiant coupling between the quantum-well excitons. This superradiant state is gradually suppressed for increasing excitation densities due to rapid loss of phase coherence via excitation induced dephasing.

Original languageEnglish (US)
Pages (from-to)105-108
Number of pages4
JournalSolid State Communications
Volume105
Issue number2
DOIs
StatePublished - Jan 1998

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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