Evidence of nonperturbative continuum correlations in two-dimensional exciton systems in semiconductor microcavities

Nai-Hang Kwong, R. Takayama, I. Rumyantsev, M. Kuwata-Gonokami, Rudolf Binder

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In nonlinear semiconductor optics, two-particle scattering is often being modeled successfully within the second Born approximation (2nd BA) of the Coulomb interaction. It is shown in this paper that, at low energies, such a perturbative treatment of Coulomb correlations applied to exciton-exciton scattering in two-dimensional systems fails even qualitatively (unless phenomenological or self-consistent dephasing processes are included in the theory). We show that the failure of the 2nd BA in two dimensions can be inferred from a comparison of our theoretical results with reported experiments of four-wave mixing signals from semiconductor microcavities.

Original languageEnglish (US)
JournalPhysical Review Letters
Issue number2
StatePublished - Jun 22 2001


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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