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Development of Highly Photosensitive Silica-based Glasses by Doping and Application to Devices

通过掺杂开发高感光二氧化硅基玻璃及其在器件中的应用

基本信息

批准号：
09555197
负责人：
HOSONO Hideo
金额：
$ 7.87万
依托单位：
TOKYO INSTITUTE OF TECHNOLOGY
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 1998
项目状态：
已结题

项目摘要

The purpose of this study was to create highly photosensitive silica-based glasses by doping and to evaluate the devise function.The results obtained are summarized as follows :(1) Enormously large refractive index change(2-4 %) upon irradiation with ArF excimer laser was found in sputter-deposited xGeO_2-(1-x)SiO_2 glass thinfilms ( x> 0.2). The sign of index change was negative and the primary origin was due to laser-induced volume expansion. This is the first discovery of such a huge index change as far as we surveyed.(2) It was found that implanat ion of proton into Ge-doped SiO_2 glasses prepared by VAD method induced the room temperaturte formation of nanocrystal line Ge particles. The depth of the formation was close to that of peak in the electronic energy deposition. NO such a formation was seen for He-ion-implanat ion. A combined effect of electronic energy deposition and chemical interaction of implanted protons with GeO2 phases in the glasses plays an essential role. This is a novel way to form nanoparticles embedded in glasses.(3) A long lasting phosphorescence glass was found in Tb^<3+>-doped ZnO-B_2O_3-SiO_2 glasses. It was suggested that The photoionozat ion of Tb^<3+> ion and the formation of F^+-type center associated with Zn^<2+> ions occur during illumination and the recombination of electron released thermally from the F+-center with photoionized Tb^<3+>gives rise to long lasting luminescence.

本研究的目的是通过掺杂来制备高光敏性的硅基玻璃，并对其性能进行评价，结果如下：（1）用ArF准分子激光辐照，发现在xGeO_2-（1-x）SiO_2（x> 0.2）玻璃薄膜中有很大的折射率变化（2- 4%）。折射率变化的符号是负的，主要来源是由于激光诱导的体积膨胀。就我们所调查的情况而言，这是第一次发现如此巨大的指数变化。(2)发现质子注入VAD法制备的Ge掺杂SiO_2玻璃中，在室温下形成了非晶态的Ge颗粒。形成的深度接近电子能量沉积的峰值深度。对于He-离子-螯合物离子，没有观察到这样的形成。电子能量沉积和注入的质子与玻璃中的GeO 2相的化学相互作用的组合效应起着至关重要的作用。这是一种形成嵌入玻璃中的纳米颗粒的新方法。(3)在Tb^3+掺杂的ZnO-B_2 O_3-SiO_2玻璃中发现了一种长余辉玻璃。结果表明，在光照过程中，Tb^<3+>离子发生光电离，并形成与Zn^<2+>离子相关的F^+型中心，F+中心热释放的电子与光电离的Tb^<3+>复合，产生长时间的发光。