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Proceedings Paper

Ultra-fast dynamics of the refractive index in laser-excited water
Author(s): P. Palyanov; F. Quere; Ph. Martin; S. Pommeret
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Paper Abstract

We report the experimental study of the ultra-fast modification of the dielectric function of pure water by an intense femtosecond laser pulse. Using a time-resolved optical interferometric technique, we measured the variation of the phase shift, which is proportional to the modification of the real part of the refractive index, as well as the variation of the fringes contrast, proportional to the modification of the absorption coefficient. We first observe a positive phase shift due to Kerr effect and immediately followed a negative one. After 200 fs, the phase shift becomes positive and remains so for at least 3 ps. Using the simple Drude -Lorentz model, we interpret this evolution as the result of electron self-trapping.

Paper Details

Date Published: 21 April 2006
PDF: 7 pages
Proc. SPIE 6160, Twelfth Joint International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 61601P (21 April 2006); doi: 10.1117/12.675343
Show Author Affiliations
P. Palyanov, Institute of Atmospheric Optics (Russia)
F. Quere, Commissariat a l'Energie Atomique, DSM/DRECAM/SPAM (France)
Ph. Martin, Commissariat a l'Energie Atomique, DSM/DRECAM/SPAM (France)
S. Pommeret, Commissariat a l'Energie Atomique, DSM/DRECAM/SCM (France)


Published in SPIE Proceedings Vol. 6160:
Twelfth Joint International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics
Gelii A. Zherebtsov; Gennadii G. Matvienko, Editor(s)

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