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- W2013669914 abstract "Poly(phenylacetylene) (PPA) and poly(p-methoxyphenylacetylene) (PMOPPA) were synthesized by catalytic polymerization of monosubstituted alkynes and were fully characterized by conventional techniques. Linear and third-order non-linear optical properties of polymers solutions were investigated at λ=780 nm using a Z-scan set-up equipped with a femtosecond laser source at different operating regimes. A high repetition rate (76 MHz) regime was used to measure the linear and non-linear absorption coefficients by means of thermo-optical effects. Values of the linear and non-linear absorption coefficients were α=4.9×10−3 cm−1 and β=1.1×10−11 cm W−1 for PPA and α=2×10−2 cm−1 and β=2.1×10−10 cm W−1 for PMOPPA. Very low repetition rate (14 Hz) excitation was used to evidence the purely-optical non-linear refractive indexes, that were γ=6×10−18 cm2 W−1 and γ=11×10−18 cm2 W−1, respectively, for PPA and PMOPPA." @default.
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- W2013669914 date "2001-10-01" @default.
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- W2013669914 title "Z-scan measurements of third-order optical non-linearities in poly(phenylacetylenes)" @default.
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- W2013669914 doi "https://doi.org/10.1016/s0379-6779(01)00455-6" @default.
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