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High third-order nonlinear optical susceptibility in new fluorinated poly(p-phenylenevinylene) copolymers measured with the Z-scan technique

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Abstract

The third-order nonlinear optical properties of a series of copoly(2,3,5,6-tetrafluoro-1,4-phenylenevinyl-ene-2,5-dioctyloxy-1,4-phenylenevinylene) that contain variable ratios of two differently substituted monomers have been studied in chloroform solutions at λ=1064 nm by the picosecond Z-scan technique. Nonlinear refractive index n2 of the samples investigated has been found to be negative, and a strong dependence of its magnitude on the copolymer’s composition has been observed. The highest third-order nonlinear optical susceptibility, χ3=6±2×10-10 esu, was measured for a copolymer obtained by reaction of equimolar quantitites of the parent monomers.

© 2002 Optical Society of America

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