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...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.展开更多
基金Supported by the National Science Foundation of China (Grant No. 50502013)Heilongjiang National Science Key Foundation (Grant No. EJG0506-01)+3 种基金Heilongji-ang Educational Bureau Foundation (Grant 11511271)Heilongjiang Youth Founda-tion (Grant Nos. QC05C15, QC05C06)Harbin Youth Foundation (Grant 2005AFQXJ062)Heilongjiang University Youth Foundation (Grant QL200516)
文摘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.
