Stability of second-order nonlinear optical properties in sol-gel matrix bearing silylated chalcone and disperse red 1

被引：38
作者：
Choi, DH [1 ]
Park, JH
Lee, JH
Lee, SD
机构：
[1] Kyung Hee Univ, ILRI, Inst Mat Sci & Technol, Coll Environm & Appl Chem, Yongin 449701, Kyungki, South Korea
[2] Seoul Natl Univ, Sch Elect Engn, Seoul 151742, South Korea
来源：
THIN SOLID FILMS | 2000年 / 360卷 / 1-2期
关键词：
nonlinear optical properties; sol-gel; chalcone;
D O I：
10.1016/S0040-6090(99)00871-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the syntheses of two triethoxysilanes for thin film fabrication. One silane (SGDR1) contains disperse red 1 (DR1) which is a second-order nonlinear optical (NLO) active chromophore. The other silane (SGCHC) bears a chalcone derivative. In order to improve the poor temporal stability of second-order NLO effects in the resulting poled sol-gel film, photo-crosslink was induced between the double bonds in chalcone units after mixing SGDR1 and SGCHC. Under UV exposure, the photocrosslink was studied with W-visible absorption and IR vibrational spectroscopy. The decaying behavior of the molecular order parameter (A(2)) after corona poling was investigated using polarized absorption spectroscopy (PAS). Second-order non-linear optical properties of the sample were studied using second-harmonic generation (SHG) and linear electro-optic (E/O) signal measurement. Poled and UV-cured film of SGDR1/SGCHC exhibited much better stability than thermally poled sample with respect to the molecular order parameter and linear electro-optic effect. (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：213 / 221
页数：9
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