Abstract
New fluorene-linked conjugated polyquinoxaline and polyquinoline possess adequate optical transparency, excellent thermal stability and good processability. Degenerate four-wave-mixing measurements on these polymers yield nonresonant third-order susceptibilities as high as 1.1×10-10 esu and nonresonant second-order hyperpolarizabilities per repeated unit as high as 2.0×10-31 esu. The large nonlinearity originates from the high electron delocalization due to the planar rigid structure of the fluorene ring and the imine nitrogen of quinoxaline and quinoline.
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42.65.An; 42.70.Nq; 78.66.Qn
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Zhan , X., Liu , Y., Zhu , D. et al. Highly efficient, thermally stable and optically transparent third-order nonlinear optical copolymers consisting of fluorene and quinoxaline/quinoline units. Appl Phys A 77, 375–378 (2003). https://doi.org/10.1007/s00339-003-2185-6
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DOI: https://doi.org/10.1007/s00339-003-2185-6