Collective effects of excitons in multiple-quantum-well bragg and anti-bragg structures

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

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Abstract

Femtosecond degenerate four-wave mixing is used to investigate collective excitonic effects in radiatively coupled semiconductor multiple-quantum-well Bragg and anti-Bragg structures. The experimental and theoretical analysis of Bragg structures shows that the light-induced coupling causes a faster signal decay for increasing quantum-well numbers. For anti-Bragg structures, the predicted splitting of the excitonic resonances is observed in the four-wave-mixing spectrum causing quantum beats in the time-integrated signal.

Original languageEnglish (US)
Pages (from-to)4199-4202
Number of pages4
JournalPhysical review letters
Volume76
Issue number22
DOIs
StatePublished - May 27 1996

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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