Investigation of third-order nonlinear optical susceptibility in polymer complexes of diarylidenealkanones

The third-order nonlinear optical susceptibility in polymer complexes of di arylidenealkanones has been investigated by the third harmonic generation t echnique at a wavelength of 1.06 mum. The macroscopic nonlinear susceptibil ity chi ((3)) measured is compared with the calculated gamma values of the second-rank molar hyperpolarizability tensor. It is demonstrated that low-m olecular chromophores can be used in syntheses of the stable polymer compos ite systems with a high nonlinear optical susceptibility. A further improve ment in the nonlinear optical properties of complexes between deprotonated chromophores and high-basicity polymers can be achieved using the proposed methods. (C) 2000 MAIK "Nauka/Interperiodica".