Radiative coupling in single quantum wells and Bragg structures

D. Ammerlahn, J. Kuhl, B. Grote, S. W. Koch, G. Khitrova, H. Gibbs, R. Hey, K. H. Ploog

Research output: Contribution to journalArticle

Abstract

Time-integrated four-wave mixing experiments reveal strong influence of the cladding layer thickness d1, its refractive index and the reflectivity of the sample-air interface on the radiative dephasing time Trad of excitons in single quantum wells and multiple quantum well structures. A cladding layer thickness of λ/2 and λ/4 decreases and increases, respectively, Trad. Furthermore, we show that the superradiance is not limited to the heavy-hole exciton but can be observed even on excited and light-hole-exciton states as well as on correlated electron-hole-pair states. All findings agree fairly well with solutions of the semiconductor Maxwell-Bloch equations.

Original languageEnglish (US)
Pages (from-to)101-106
Number of pages6
JournalPhysica Status Solidi (B) Basic Research
Volume221
Issue number1
DOIs
StatePublished - Sep 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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