Naphthoquinone methide dyes show a large Pockels coefficient at 1.3 µm when poled in a polymer matrix: the second-order nonlinear hyperpolarizability (µβ) values obtained from Pockels coefficients that appear after poling in a constant electric field are (5700–7400)× 10–48 esu, being much higher than that of commonly used Disperse Red 1 (DR1).
Y. Kubo, S. Aramaki, Y. Okamoto and T. Murayama, J. Chem. Soc., Chem. Commun., 1995, 969 DOI: 10.1039/C39950000969
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