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Conferences > CLEO > 1990 > JTUC > JTUC2
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1990),
  • paper JTUC2

Femtosecond recovery of exciton bleaching in the optical Stark effect

J. P. SOKOLOFF, S. G. LEE, R. JIN, P. A. HARTEN, R. BINDER, STEPHAN W. KOCH, H. M. GIBBS, and NASSER PEYGHAM-BARIAN

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Abstract

The optical Stark effect of excitons in semiconductors, where the exciton resonance is blue shifted by an off-resonance light beam, has been actively studied. Here we report on the observation of a very fast recovery of the exciton bleaching for an off-resonance excitation condition in a quantum well sample at room temperature. The good agreement between the experimental results and our numerical calculations of the time-resolved absorption spectra suggests a coherent transient population buildup and decay occurring on the time scale of the pump pulse.

© 1990 Optical Society of America

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