Optically nonlinear polymer: preparation and characterization of ceramic ultrastructure composites

A. K. Tripathi; Tara Chand Goel; P. K. C. Pillai; Kehar Singh

doi:10.1117/12.305576

16 April 1998 Optically nonlinear polymer: preparation and characterization of ceramic ultrastructure composites

A. K. Tripathi, Tara Chand Goel, P. K. C. Pillai, Kehar Singh

Proceedings Volume 3321, 1996 Symposium on Smart Materials, Structures, and MEMS; (1998) https://doi.org/10.1117/12.305576
Event: Smart Materials, Structures and MEMS, 1996, Bangalore, India

Abstract

Transparent Polyimide: LiNbO₃ and Polyimide1: BaTiO₃ films were prepared by insitu polymerization of PI and gelation of respective alkoxide sols of the ceramics. These films were characterized structurally by x-ray and SEM. The x-ray diffractograms clearly indicates the presence of crystalline ceramic phase in these films. The optical transmission spectra shows about 80% transmission in the visible range. SEM micrographs shows the presence of ceramics clusters in the polymeric matrix. Moreover the crystallites are distributed in an orderly fashion in these clusters. The dielectric constant at room temperature was found to be about 6 and 10 respectively for LiNbO₃ and BaTiO₃ composite films. Dielectric loss is very low. Optical phase conjugation using degenerate four wave mixing technique has been observed in PI:LiNbO3 film, while hologram was recorded and reconstructed in two wave mixing in the transmission grating mode.

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A. K. Tripathi, Tara Chand Goel, P. K. C. Pillai, and Kehar Singh "Optically nonlinear polymer: preparation and characterization of ceramic ultrastructure composites", Proc. SPIE 3321, 1996 Symposium on Smart Materials, Structures, and MEMS, (16 April 1998); https://doi.org/10.1117/12.305576

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