Transition from superradiant free-polarization decay to subradiant photon-echo

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

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Time-resolved degenerate four-wave mixing experiments on a multiple-quantum-well Bragg structure reveal a complex real-time pattern of the nonlinear optical response from the superradiant and the subradiant coupled exciton-photon modes. We find a free-polarization decay for the superradiant mode and a photon-echo from the subradiant modes. Rotation of the Bragg structure with respect to the incident laser beams implying a reduction of the effective quantum well separation results in a distinct change of the temporal behaviour. We estimate a value of less than 40 μeV for the nonradiative contribution to the homogeneous linewidth of free excitons in our GaAs samples.

Original languageEnglish (US)
Pages (from-to)787-791
Number of pages5
JournalSolid State Communications
Issue number10
StatePublished - Nov 5 1998

ASJC Scopus subject areas

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


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