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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 2, Iss. 4 — Apr. 1, 1985
  • pp: 654–662

Three-pulse scattering for femtosecond dephasing studies: theory and experiment

A. M. Weiner, S. De Silvestri, and E. P. Ippen  »View Author Affiliations


JOSA B, Vol. 2, Issue 4, pp. 654-662 (1985)
http://dx.doi.org/10.1364/JOSAB.2.000654


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Abstract

A novel transient three-pulse scattering technique for measuring ultrafast dephasing times in condensed matter is analyzed using a perturbative solution of the density matrix equation. The advantages of this technique include subpulsewidth resolution, a clear distinction between homogeneous and inhomogeneous broadening, and sensitivity to spectral cross-relaxation. Its application to the case of a multilevel resonance is also considered. We report results of femtosecond dephasing experiments with dye molecules in liquids and in a polymer host. The dephasing time is determined to be less than 20 fsec for dyes in solution at room temperature. At low temperatures in polymers, a transition from homogeneous to inhomogeneous broadening has been observed and studied as a function of temperature.

© 1985 Optical Society of America

Citation
A. M. Weiner, S. De Silvestri, and E. P. Ippen, "Three-pulse scattering for femtosecond dephasing studies: theory and experiment," J. Opt. Soc. Am. B 2, 654-662 (1985)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-2-4-654

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