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Optics Letters

Optics Letters


  • Vol. 13, Iss. 10 — Oct. 1, 1988
  • pp: 859–861

Optical nonlinearities in AlxGa1−xAs/GaAs asymmetric coupled quantum wells

H. Q. Le, J. V. Hryniewicz, W. D. Goodhue, and V. A. Mims  »View Author Affiliations

Optics Letters, Vol. 13, Issue 10, pp. 859-861 (1988)

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Optical nonlinearties of AlxGa1−xAs/GaAs asymmetric coupled quantum wells within a p-i-n structure have been observed by using time-resolved spectroscopy. Under photoexcitation, exciton absorption lines exhibit spectral shifts of as much as ≈1 meV. The recovery times of these spectral shifts are of the order of hundreds of picoseconds when the excitation photon is above the lowest exciton state but become less than 10 psec when excitation is below the lowest exciton state, indicating a virtual process. The behavior of these spectral shifts is consistent with the presence of a polarization induced by optical pumping. The polarization is believed to be due to the excitons that have nonvanishing electric dipole moments along the axis of the asymmetric coupled quantum wells.

© 1988 Optical Society of America

Original Manuscript: November 23, 1987
Manuscript Accepted: July 12, 1988
Published: October 1, 1988

H. Q. Le, J. V. Hryniewicz, W. D. Goodhue, and V. A. Mims, "Optical nonlinearities in AlxGa1−xAs/GaAs asymmetric coupled quantum wells," Opt. Lett. 13, 859-861 (1988)

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