PMID: 11308845Apr 20, 2001Paper

Performances of holographic gratings monitored by laser-induced phase separation in liquid mixtures

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
S BuilJ P Delville

Abstract

We theoretically describe and experimentally explore the kinetics of holographic grating formation resulting from different laser-induced phase separation mechanisms. Our method makes use of two interfering c.w. laser waves to quench binary mixtures in composition, and to optically trap the nucleated domains on the fringes. Essentially, two different processes can lead to these variations in concentration: electrostriction and thermodiffusion. The former originates from induced dipolar couplings in a field gradient; as photopolymerization, this is a local process which is essentially sensitive to the q=q(0) Fourier mode forced by the fringe modulation. The latter corresponds to a variation in composition driven by a small thermal gradient; as solvent evaporation and thermal heating techniques, it is nonlocal and behaves as 1/q(2) because of its dissipative origin. By making experiments in both cases, we show that this q dependence on excitation has a strong influence on the performance of holographic gratings. While in the first case reflectivity saturates because the phase transition is confined by the fringes which behave as separated optical boxes with "soft walls" which calibrate the droplet size, blurring is expected for f...Continue Reading

References

May 15, 1989·Physical Review A: General Physics·B Jean-JeanB Pouligny
Mar 1, 1994·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·E FreyszA Ducasse
May 1, 1994·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·J P DelvilleA Ducasse
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Apr 24, 2002·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·J P DelvilleA Ducasse
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Citations

Jul 13, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Emmanuel HugonnotJean-Pierre Delville
Apr 12, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Régis WunenburgerJean-Pierre Delville
Jul 13, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Emmanuel Hugonnot, Jean-Pierre Delville
Dec 1, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·Makiko TanakaHitoshi Watarai

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