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PREPARATION OF MICRO-OPTICS MATERIALS BY MEANS OF SURFACE CRYSTALLIZATION OF GLASSES

玻璃表面结晶制备微光学材料

基本信息

批准号：
09555193
负责人：
NANBA Tokuro
金额：
$ 7.68万
依托单位：
Okayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

The purpose of the research project is to develop a new technique, Ultrasonic Surface Treatment (UST), control the surface crystallization of glasses for preparation functional optical materials, especially for nonlinear materials. The potential applications in micro-optical devices are to be explored. The research results obtained are summarized as follows :Surface crystallization of LiNbOィイD23ィエD2 on KィイD22ィエD2O・(35-x)LiィイD22ィエD2O・30NbィイD22ィエD2OィイD25ィエD2・35SiOィイD22ィエD2 (mol%) glasses was investigated. The c-axis orientation of surface crystallized LiNbOィイD23ィエD2 was improved when 10mol% KィイD22ィエD2O was added in the glass. Furthermore, Li ions in the LiNbOィイD23ィエD2 crystallites were partially exchanged by K ions from the glass. Transparent surface crystallized LiNbOィイD23ィエD2 films on glasses were prepared by the controlled heat treatment, which showed optical second harmonic generation. The estimated second-order nonlinear optical susceptibilities were dィイD233ィエD2=6.40pm/V and dィイD231 … More ィエD2=dィイD221ィエD2=dィイD224ィエD2=dィイD215ィエD2=1/3dィイD233ィエD2=2.14pm/V for a thin film (1.33mm in thickness) prepared after heating at 620℃ for 3h, when the c-axis oriented thin film was described by a space group CィイD2αVィエD2.Crystal slab optical waveguides of calcium aluminum silicate (CaィイD22ィエD2AlィイD22ィエD2SiOィイD27ィエD2) were prepared by controlled surface crystallization of glass using ultrasonic surface treatment (UST) and heat treatment. Here UST is necessary to get uniform crystalline films showing optical waveguide characteristics. By controlling the depth of the waveguides with varying heat treatment temperatures and tomes, single-mode and multi-mode waveguides were obtained. The refractive index and optical propagation loss of the slab waveguides was characterized.The research results indicate that the UST technique for controlled surface crystallization of glass is very unique and useful. By means of this technique, oriented, dense, and transparent thin films showing optical nonlinear and waveguide could be prepared. The advantages of glass and crystal could be combined by preparing surface crystallized optical materials. There is potential application of the technique for various micro-optical materials.Particularly, the UST technique reduces significantly the beginning temperature of crystallization, avoiding deformation of mother glass. It is therefore concluded that the UST technique has a bright prospect of developing the optical waveguides. Less

本研究项目的目的是开发一种新的技术，即超声表面处理(UST)，以控制玻璃的表面结晶，以制备功能光学材料，特别是非线性材料。在微光学器件中的潜在应用有待探索。主要研究成果如下：研究了KィイD22ィエD2O・(35-x)LiィイD22ィエD2O・30NbィイD22ィエD2OィイD25ィエD2・35SiOィイD22ィエD2(摩尔分数)玻璃上LiNbOィイD23ィエD2的表面析晶行为。在玻璃中加入10mol%K-ィイ-D22-ィエ-D2O后，表面晶化的LiNbO-ィイ-D23-ィエ-D2的c轴取向得到改善。此外，LiNbOィイD23ィエD2微晶中的Li离子被玻璃中的K离子部分交换。采用控制热处理的方法在玻璃表面制备了透明的表面晶化LiNbOィイD23ィエD2薄膜，显示了光学二次谐波的产生。估算的二阶非线性光学系数为dィイD233ィエD2=6.40 pm/V和dィイD231…用C-ィエD2=dィイD221ィエD2=dィイD224ィエD2=dィイD215ィエD2=1/3dィイD233ィエD2=2.14pm/V D2-ィエ-D2空间群描述c轴取向的薄膜，在620℃下加热3h，可获得更多的ィイ，厚度为1.33 mm的薄膜。采用超声表面处理和热处理控制玻璃表面晶化，制备了钙铝硅酸盐平板光波导(Ca-ィエ-D22-ィイ-D22-ィエ-D2SiO-ィイ-D27-ィエ-D2)。在这里，为了获得具有光波导特性的均匀晶态薄膜，UST是必要的。通过控制不同热处理温度和厚度的波导深度，得到了单模和多模两种类型的光波导。对平板光波导的折射率和光传输损耗进行了表征，研究结果表明UST技术用于控制玻璃表面晶化是非常独特和实用的。利用该技术可以制备出具有光学非线性和光波导特性的取向、致密、透明的薄膜。通过制备表面晶化光学材料，可以将玻璃和晶体的优点结合起来。该技术在各种微光学材料中具有潜在的应用前景，特别是UST技术显著降低了析晶起始温度，避免了母玻璃的变形。因此，UST技术在发展光波导方面具有广阔的前景。较少

项目成果

期刊论文数量（0）

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Y. Ding: "Surface Crystallization of CsLiBィイD26ィエD2OィイD210ィエD2 Glass"Borate Glasses, Crystals & Melts, Ed. By A. C. Wright, S, A. Feller & A. C. Hannon (Proc. 2ィイD1ndィエD1 Int. Conf. On Borate Glasses, Crystals & Melts). 453-460 (1997)

Y. Ding：“CsLiB-D26-D2O-D210-D2 玻璃的表面结晶”硼酸盐玻璃、晶体和熔体，A. C. Wright、S、A. Feller 和 A. C. Hannon 编（Proc. 2 D1ndieD1 Int. Conf. On硼酸盐玻璃、晶体和熔体）453-460 (1997)。