Four-wave-mixing in radiatively coupled multiple-quantum-well structures: A model study

S. Haas, T. Stroucken, A. Knorr, F. Jahnke, S. W. Koch

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The influence of radiative coupling on the four-wave-mixing signals of multiple-quantum-well structures is investigated theoretically for excitation at the excitonic resonance. It is shown that amplitude and shape of the FWM signals depend strongly on the number of quantum wells N in the sample and on the periodicity of the structure. For a fixed delay time τ12, the signal amplitude of a Bragg structure increases quadratically with N due to constructive interference as long as the radiative decay rate Nγrad is small compared to the inverse delay time τ12-1. For large N, if the enhanced radiative decay rate exceeds the inverse delay time, superradiant emission leads to a decrease of the observed signals with increasing N. The signals of anti-Bragg structures with an odd number of quantum wells decrease with increasing N due to destructive interference effects whereas anti-Bragg structures with an even number of quantum wells behave similarly to Bragg structures.

Original languageEnglish (US)
Pages (from-to)19-22
Number of pages4
JournalPhysica Status Solidi (A) Applied Research
Issue number1
StatePublished - Jan 1 1997

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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