Improved Second Harmonic Generation from Organic-Dye-Doped Polymer/Silica Hybrid Materials

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• 作者：Zhanjia J. Hou ; Liying Y. Liu ; Lei Xu ; Zhiling L. Xu ; Wencheng C. Wang ; Fuming M. Li ; and Mingxin X. Ye
• 刊名：Chemistry of Materials
• 出版年：1999
• 出版时间：November 1999
• 年：1999
• 卷：11
• 期：11
• 页码：3177 - 3180
• 全文大小：51K
• 年卷期：v.11,no.11(November 1999)
• ISSN：1520-5002

文摘

In this study, we investigated the second-order optical nonlinearity and its thermal stabilityof DR1 (disperse red 1) doped poly(methyl methacrylate) (PMMA)/silica gel films. We foundthat in situ polymerization of sol-gel precursors (tetraethoxysilane, TEOS) in a polymergenerated a hybrid matrix which is a good tradeoff between a silica gel and a polymer matrix.The nonlinear thermal stability of the hybrid system increased significantly compared tothat of a poled DR1/PMMA film. Our result proved that the combination of a poled polymerand the sol-gel technique provides a way to increase the thermal stability of nonlinear opticalthin films fabricated from existing materials rather than synthesizing new chemicalcompounds. Several factors which affect the second-order optical nonlinearity of the hybridsystem were also examined.