Preparation and characterization of a poled nanocrystal and polymer composite PbTiO3/PEKc film for electro-optic applications |
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Authors: | Q Ren D Xu YT Chow ZH Lü CB Ma GH Zhang HP Chan PL Chu |
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Institution: | (1) The Optoelectronics Research Centre, City University of Hong Kong, Kowloon, Hong Kong, HK;(2) Department of Optics, Shandong University, Jinan 250100, P.R. China, CN;(3) National Laboratory of Crystal Materials, Shandong University, Jinan 250100, P.R. China, CN |
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Abstract: | Composite thin films of PbTiO3 nanocrystals and high-transparency PEKc polymer for applications in electro-optical devices were prepared using the spin
coating technique. The size of the PbTiO3 nanocrystals was estimated to be 30–40 nm using a transmission electron microscope. The transmission technique, a simple
method for measuring the electro-optic coefficients of poled composite polymer films was developed. The electro-optic coefficient
γ33 of poled PbTiO3/PEKc composite polymer films was measured to be 18.34 pm V-1 at 633 nm under room temperature. The index at 633 nm and the dielectric constant at 100 kHz under room temperature were
determined to be 1.65248 and 7.32, respectively. The figure of merit F2=n7γ2/ε was estimated to be 1546, showing very good electro-optical properties.
Received: 5 February 2002 / Accepted: 12 March 2002 / Published online: 19 July 2002
RID="*"
ID="*"Corresponding author. Fax: +852/2788-7791, E-mail: eeytc@cityu.edu.hk |
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Keywords: | PACS: 81 05 78 20 77 84 78 30 78 66 |
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