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Journal of Luminescence

Multi-wave-mixing of two-dimensional excitons in semiconductors

Atsushi Hasegawa, T.E. Kishimoto, Yasuyoshi Mitsumori, Masahide Sasaki, F. Minami

Published Feb 27, 2004• 4 citations
Publisher
DOI
10.1016/j.jlumin.2004.01.045

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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.