NONLINEAR OPTICAL PROPERTIES OF CHROMOPHORE-CONTAINING POLYIMIDES WITH COVALENTLY ATTACHED DYES
A. I. Gorkovenko1, A. I. Plekhanov1, A. E. Simanchuk1, A. V. Yakimanskii2, N. N. Smirnov2, N. A. Solovskaya2, G. I. Nosova2
1Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, pr. Akademika Koptyuga 1, Novosibirsk, 630090 Russia
2Institute of Macromolecular Compounds, Russian Academy of Sciences, Bol’shoy Prospect 31, St. Petersburg, 199004 Russia
Keywords: electro-optic polymers, ellipsometry, second harmonic generation
Abstract
Spectral dependences of quadratic nonlinear coefficients of new chromophore-containing polyimides with covalently attached DR13 chromophore molecules are synthesized and studied by the second-harmonic generation method in the fundamental radiation wavelength from 800 to 1400 nm. The obtained record values of quadratic nonlinear coefficients are 80 to 120 pm/V. Dispersions of refractive indices and extinction coefficients in the spectral range from 400 to 800 nm are determined by spectral ellipsometry, resulting in the improved accuracy of nonlinear coefficients.
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