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Optica Publishing Group
  • International Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 1998),
  • paper QThF6

Effects of exciton-exciton correlation on parametric scattering of cavity polaritons

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Abstract

Optical properties of normal-mode coupling, called cavity-polariton modes, in semiconductor microcavity (NMC-SMC) have been studied extensively1-3 at high- as well as low-density regimes. The study of high-density excitation of such a system elucidates the role of the many-body Coulomb effects, and the observed features have been well explained by the semiconductor Bloch equations (SBEs).4,5 However, at low-density regime, the three-particle and four-particle correlation become pronounced, which requires a theoretical treatment beyond SBEs. As a natural extension to Hatree-Fock SBEs, the exciton-carrier correlation that leads to excitation-induced dephasing (EID) has been shown to play a dominant role in the nonlinear optical processes at X3 regime.6,7 At low-density regime, on the other hand, experimental results8,9 indicate that the processes mediated by the four-particle correlation play an essential role not only at the bound biexciton resonance but also at the nearly free two-exciton resonance. Therefore, the nonlinear optical effect on NMC-SMC at low-density regime may bring new aspects of the many-body effect beyond SBEs.

© 1998 Optical Society of America

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