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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1993),
  • paper QWC2

Nonlinear optical response of magnetoexcitons in GaAs

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Abstract

Investigations of the magneto-optical properties of semiconductors provide important information about band structure and interactions between the material and the field. These studies are also a powerful means to examine effects of quantum confinement.1 In this paper we present high-resolution frequency-domain four- wave-mixing (FWM) measurements of magnetoexcitons in GaAs, showing inter Landau-level coupling and the spin-polarization independence of the nonlinear optical response. By analyzing the excitation decay dynamics of hh1 and hh2 magnetoexcitons, we have determined the strengths of the interaction between magnetoexcitons with n′ = n (X–Xinteraction) and that with n' ≠ n (X–X' interaction), demonstrating that the Coulomb interaction dominates in both types of interactions. The importance of inter-Landau coupling has recently been examined in quantum-well structures.2

© 1993 Optical Society of America

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