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  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 2001),
  • paper QThP3

Coulomb memory effects in the ultrafast dynamics of quantum well magnetoexcitons

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Abstract

We study theoretically the role of exciton-exciton correlations in the ultrafast nonlinear optical response of quantum well (QW) excitons in a perpendicular magnetic field B. The important effect of the magnetic field is that, by freezing the kinetic energy of the photoexcited carriers in two spatial dimensions, it increases the relative strength of the interactions. In bulk semiconductors, experiments show a strong enhancement of the four-wave-mixing (FWM) signal with increasing field accompanied by a long non-Markovian decay for negative time delays.1

© 2001 Optical Society of America

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