Coherent dynamics of radiatively coupled quantum-well excitons

T. Stroucken, A. Knorr, P. Thomas, S. Koch

Research output: Contribution to journalArticlepeer-review

172 Scopus citations

Abstract

The optical response of radiatively coupled semiconductor multiple-quantum-well structures is investigated theoretically. It is shown that the transverse optical field leads to a coupling of exciton states within each well which causes a radiative decay and a mixing of excitonic resonances. Simultaneously, the field-induced long-ranged coupling between different wells leads to collective effects that are very sensitive to the detailed geometry of the structure. For a quantum-well spacing equal to an integer multiple of half the optical wavelength inside the medium, it is predicted that the collective effects cause a stimulated decay of electronic excitations that should be observable in either transmission or reflection geometry. On the other hand, in a quarter wavelength structure, the light-induced coupling causes an interwell energy transport and a splitting of the excitonic resonances, that should be observable as quantum beats in the time-resolved transmitted or reflected signal.

Original languageEnglish (US)
Pages (from-to)2026-2033
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume53
Issue number4
DOIs
StatePublished - Jan 1 1996

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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