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, and K. Ploog
Phys. Rev. Lett. 76, 4199 – Published 27 May 1996
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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.

  • Received 15 December 1995

DOI:https://doi.org/10.1103/PhysRevLett.76.4199

©1996 American Physical Society

Authors & Affiliations

M. Hübner and J. Kuhl

  • Max-Planck-Institut für Festkörperforschung, D-70569 Stuttgart, Germany

T. Stroucken, A. Knorr, and S. W. Koch

  • Department of Physics and Materials Sciences Center, Philipps Universität, Renthof 5, D-35032 Marburg, Germany

R. Hey and K. Ploog

  • Paul Drude Institut für Festkörperelektronik, D-10177 Berlin, Germany

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Vol. 76, Iss. 22 — 27 May 1996

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