Journal of the Optical Society of Korea

Optical Society of Korea (한국광학회)
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Femtosecond degenerate and nondegenerate pump-probe experiments in bulk GaAs below the band gap

  • Yahng, J. S. (Department of Physics, Seoul National University) ;
  • Kim, D. S. (Department of Physics, Seoul National University) ;
  • Fatti, N.Del (Laboratoire dOptique Quantique du Centre National de la Recherche Scinetifique Ecole Polytechnique) ;
  • Vallee, F. (Laboratoire dOptique Quantique du Centre National de la Recherche Scinetifique Ecole Polytechnique)
  • Received : 1997.08.05
  • Published : 1997.09.01
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Abstract

We perform degenerate and nondegenerate pump-probe experiments on bulk GaAs at 100 K below the band gap. We mostly observe a negative differential transmission signal both in the degenerate and nondegenerate experiments. We interpret our signal as due to two-photon absorption. This negative signal has a different origin from the normally considered band gap renormalization for resonant excitations.

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References

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  1. Femtosecond frequency mixing in thick bulk GaAs vol.63, pp.8, 2001, https://doi.org/10.1103/PhysRevB.63.085206