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Proceedings Paper

Phase conjugation and four-wave mixing in a colloidal medium
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Paper Abstract

We demonstrate phase conjugation by means of degenerate four-wave mixing from a colloidal crystal. The nonlinear medium is provided by a periodic spatial refractive index grating created in a colloidal suspension of dielectric microparticles trapped in the intensity distribution of two nearly copropagating interfering laser beams. Phase conjugation is achieved for a probe beam carrying orbital angular momentum as evidenced by the inversion of the topological charge of a phase singularity within the beam. The e ciency and nonlinear parameters of the colloidal crystal as well as its lattice properties are measured and compared to theoretical predictions and previous experimental work.

Paper Details

Date Published: 11 September 2006
PDF: 8 pages
Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 63262I (11 September 2006); doi: 10.1117/12.677222
Show Author Affiliations
C. López-Mariscal, Tecnológico de Monterrey (Mexico)
J. C. Gutiérrez-Vega, Tecnológico de Monterrey (Mexico)
D. McGloin, The Univ. of St. Andrews (United Kingdom)
K. Dholakia, The Univ. of St. Andrews (United Kingdom)

Published in SPIE Proceedings Vol. 6326:
Optical Trapping and Optical Micromanipulation III
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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