We investigated the third-order nonlinear optical properties of donor–acceptor substituted hydrazones doped into PMMA matrix using single beam Z-scan technique at 532 nm. The magnitude of third-order susceptibility, χ(3) is of the order of 10−13esu. The nonlinear refractive index, n2 and the molecular second order hyperpolarisability, γh are of the order of 10−11esu and 10−32esu, respectively. The compounds exhibit larger third-order NLO properties in PMMA host when compared to the pure compounds. The study reveals that these hydrazones are a good candidate of nonlinear optical materials for photonic applications. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
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