Development of low-melting glasses containing organic molecules for photoinduced refractive index change

开发含有有机分子的低熔点玻璃以实现光致折射率变化

基本信息

批准号：
12555249
负责人：
TAKAHASHI Masahide
金额：
$ 8.26万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2003
项目状态：
已结题

项目摘要

Transparent materials with a large figure-of-merit(FOM) are strongly required to realize active photonic devices for the optical telecommunication and the photonic information processing. Although organic molecules generally show excellent optical nonlinear properties, their chemical durability is relatively low for the practical applications. In addition, some of inorganic single crystals exhibit enough FOM, but they have difficulty in preparation and fabrication into various forms such as thin film, waveguides, and so on. Inorganic glasses have excellent both the excellent chemical durability and workability. However, their FOM for photonic applications are relatively low. Glasses with low-melting temperatures so-called low melting glasses can be doped with various functional organic molecules. Low-melting glasses presently available usually contain lead or other heavy metal cations, which are unsuitable for environmental protection. In the present study, attempt has been made to develop new family of low-melting glasses capable of doping with optical functional organic molecules. We focused on the development of organic-inorganic hybrid glasses with a large photorefractive index change.Silica related materials with a photorefractive index change exceeding 10^<-3> order have been developed and micro fabricated in planer waveguide by laser direct writing technique. In addition, novel hybrid glass system prepared through non-aqueous acid-base reactions is proposed, which can be doped with various active centers. Now, however, the glasses are just a holder of organic molecules. New materials with synergetic effect of organic molecules and glass host is expected for the further research on the present materials.

强烈需要具有大品质因数（FOM）的透明材料来实现用于光通信和光子信息处理的有源光子器件。尽管有机分子通常表现出优异的光学非线性特性，但其化学耐久性在实际应用中相对较低。此外，一些无机单晶表现出足够的FOM，但它们难以制备和加工成各种形式，例如薄膜、波导等。无机玻璃兼具优良的化学耐久性和加工性。然而，它们用于光子应用的 FOM 相对较低。具有低熔点温度的玻璃，即所谓的低熔点玻璃，可以掺杂各种功能性有机分子。目前的低熔点玻璃通常含有铅或其他重金属阳离子，不利于环境保护。在本研究中，已尝试开发能够掺杂光学功能有机分子的新型低熔点玻璃。我们重点开发光折射率变化大的有机-无机杂化玻璃。开发出光折射率变化超过10^<-3>量级的二氧化硅相关材料，并采用激光直写技术在平面波导中进行微加工。此外，还提出了通过非水酸碱反应制备的新型杂化玻璃体系，该体系可以掺杂各种活性中心。然而现在，玻璃只是有机分子的载体。有机分子与玻璃基质协同作用的新材料有望在现有材料的基础上进一步研究。