Spin-resolved femtosecond magnetoexciton interactions in GaAs quantum wells

J. B. Stark, W. H. Knox, and D. S. Chemla
Phys. Rev. B 46, 7919 – Published 15 September 1992
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Abstract

We use femtosecond nonlinear spectroscopy and high magnetic fields to study quantum-well excitonic states of well-defined angular momentum character. Our results show that the femtosecond nonlinear optical response is governed by exciton-exciton interactions that depend on the angular momentum character of the initially excited distribution. Remarkably, optically active excitons at high magnetic field undergo spin relaxation to an optically inactive state.

  • Received 8 June 1992

DOI:https://doi.org/10.1103/PhysRevB.46.7919

©1992 American Physical Society

Authors & Affiliations

J. B. Stark, W. H. Knox, and D. S. Chemla

  • AT&T Bell Laboratories, Holmdel, New Jersey 07733

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Issue

Vol. 46, Iss. 12 — 15 September 1992

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