Abstract
PolySchiff base containing triphenylamine has been synthesized by polycondensation and characterized by FT-IR, NMR, UV-visible spectrometer. Measurements of the third-order optical nonlinear susceptibility χ (3) by Z-scan technique have shown that the large nonlinearity is dominated by the two-photon absorption in PSB. The sign and size of real part Reχ (3), nonlinear refractive index n 2 have been measured with the condition of 532 nm, 8 ns-duration pulses to be −1.23×10−10 esu, −3.06×10−12 esu; nonlinear absorption index β and size of image part lmχ (3) to be 3.63×10−10 m/W, 1.15×10−11 esu, respectively, so the third-order nonlinear susceptibility χ (3) is 1.19×10−11 esu. The value is larger than other polymers reported. PSB is self-focusing material and has potential application in nonlinear optic field.
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Supported by the National Science Foundation of China (Grant No. 50502013), Heilongjiang National Science Key Foundation (Grant No. EJG0506-01), Heilongjiang Educational Bureau Foundation (Grant 11511271), Heilongjiang Youth Foundation (Grant Nos. QC05C15, QC05C06), Harbin Youth Foundation (Grant 2005AFQXJ062), and Heilongjiang University Youth Foundation (Grant QL200516)
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Niu, H., Wang, W., Huang, Y. et al. Study of third-order nonlinear susceptibility of polySchiff base containing triphenylamine. SCI CHINA SER B 50, 230–237 (2007). https://doi.org/10.1007/s11426-007-0021-0
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DOI: https://doi.org/10.1007/s11426-007-0021-0