The third-order nonlinear optical susceptibility (χ<sup>〈3〉</sup>) of poly(<i>N</i>-vinylcarbazole) (PVK) and two other modified polymers based on carbazole derivatives has been measured by degenerate four-wave mixing at 532 nm in a tetrahydrofuran solution. The polymer exhibits large third-order nonlinear optical susceptibility (χ<sup>〈3〉</sup>) values. The calculated χ<sup>〈3〉</sup> value for the copolymer 3-(2-metacryletoxy)carbonyl 7 diethylamin-coumarine (PC1MK), which was obtained by linking 2-(9-carbazolyl)ethyl methacrylate polymer with 3-(2-metacryletoxy)carbonyl 7 diethylamin-coumarine monomer, is approximately 3 times larger than those of poly(3-methoxy-<i>N</i>-vinyl)carbazole and (PVK).
© 2002 Optical Society of America
Izabela Fuks, Beata Derkowska, Bouchta Sahraoui, Stanislaw Niziol, Jerzy Sanetra, Dariusz Bogdal, and Jan Pielichowski, "Third-order nonlinear optical susceptibility of polymers based on carbazole derivatives," J. Opt. Soc. Am. B 19, 89-93 (2002)