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Proceedings Paper

Optically nonlinear polymer: preparation and characterization of ceramic ultrastructure composites
Author(s): A. K. Tripathi; Tara Chand Goel; P. K. C. Pillai; Kehar Singh
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Paper 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.

Paper Details

Date Published: 16 April 1998
PDF: 8 pages
Proc. SPIE 3321, 1996 Symposium on Smart Materials, Structures, and MEMS, (16 April 1998); doi: 10.1117/12.305576
Show Author Affiliations
A. K. Tripathi, Indian Institute of Technology (India)
Tara Chand Goel, Indian Institute of Technology (India)
P. K. C. Pillai, Indian Institute of Technology (United States)
Kehar Singh, Indian Institute of Technology (India)

Published in SPIE Proceedings Vol. 3321:
1996 Symposium on Smart Materials, Structures, and MEMS
Vasu K. Aatre; Vijay K. Varadan; Vasundara V. Varadan, Editor(s)

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