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Degenerate Four Wave Mixing in Staggered Type-II AlxGa1−xAs/AlAs Multiple Quantum Well Structures

  • T. Mishina
  • F. Sasaki
  • Y. Masumoto
Conference paper
Part of the Springer Series in Chemical Physics book series (CHEMICAL, volume 53)

Abstract

Recently much attention has been paid to carrier dynamics in staggered type-II multiple quantum well structures. In these systems, the energy level of the lowest Γ conduction electron state in a well layer is higher than that of the Γ-electron state in a barrier layer. Thus the photoexcited F-electrons in the well layer are easily scattered into the X-state in the barrier layer. The electrons scattered into the X-state in the barrier layer are expected to form X-Γ indirect excitons with holes in the well layer. We and several authors have measured these interlayer scattering times using femtosecond pump-and-probe technique with white light continuum [1,2,3]. However, the dephasing and momentum relaxation processes of the carriers in staggered type-II systems have not been understood. To clarify these relaxation processes, we have performed the time-resolved degenerate-four-wave mixing experiments in staggered type-II multiple quantum well structures.

Keywords

Barrier Layer Multiple Quantum Optical Anisotropy Carrier Dynamic White Light Continuum 
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References

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Copyright information

© Springer-Verlag Berlin, Heidelberg 1990

Authors and Affiliations

  • T. Mishina
    • 1
  • F. Sasaki
    • 1
  • Y. Masumoto
    • 1
  1. 1.Institute of PhysicsUniversity of TsukubaTsukuba, Ibaraki 305Japan

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