Control of the photorefractive effect using a low Tg sol-gel glass |
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Authors: | Dong Hoon Choi Woongi Jun Kwang Yong Oh Jae Hong Kim |
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Affiliation: | (1) College of Environment and Applied Chemistry, Materials Center for Information Display, Institute of Natural Sciences, Kyung Hee University, Yongin, Kyungki 449-701 Korea, KR |
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Abstract: | Summary
We prepared the photorefractive sol-gel glass based on organic-inorganic hybrid materials containing a charge transporting
molecule, second-order nonlinear optical chromophore, photosensitizer, and plasticizer. Carbazole and 2-{ 4-(2-hydroxyethyl)
methylamino]benzylidene}malononitrile were reacted with 3-isocyanatopropyl triethoxysilane and the functionalized silanes
were employed to fabricate the efficient photorefractive media including 2,4,7-trinitrofluorenone (TNF) to form a charge transfer
complex. The simplest way to vary the composition in the matrix was to mix the desired amount of the functionalized alkoxysilane.
The prepared sol-gel glass samples contained a large amount of nonlinear optical (NLO) chromophore compared to that of the
charge transporting molecules. They showed a large net gain coefficient and high diffraction efficiency at certain conditions.
Received:27 May 2002/Revised version:23 August 2002/Accepted:7 September 2002
Correspondence to Dong Hoon Choi E-mail: dhchoi@khu.ac.kr |
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Keywords: | |
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