2003 Fiscal Year Final Research Report Summary
Development of low-melting glasses containing organic molecules for photoinduced refractive index change
| Project/Area Number |
12555249
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
無機工業化学
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
TAKAHASHI Masahide Kyoto University, Institute for Chemical Research, Associate Professor, 化学研究所, 助教授 (20288559)
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| Co-Investigator(Kenkyū-buntansha) |
SHIMADA Ryoko Kyoto University, Institute for Chemical Research, Instructor, 化学研究所, 助手 (90346049)
KONDO Yuki Akashi Glass Co.Ltd., Central Research Center, Chief Researcher, 中央研究所, 主席研究員
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| Project Period (FY) |
2000 – 2003
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| Keywords | photorefractive / organic-inorganic hybrid / low-melting glass / nonlinear optical property / acid-base reaction / phosphate glass / planer light wave circuit / ultraviolet laser |
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| Research Abstract |
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.
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[Journal Article] Photochemical process of divalent germanium responsible for photorefractive index change in GeO_2-SiO_2 glasses2004
Author(s)
Takahashi, M., Sakoh, A., Tokuda, Y., Yoko, T., Nishii, J., Nishiyama, H., Miyamoto
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Journal Title
J.Non-Cryst.Solids 345&346
Pages: 323-327
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Photosensitive GeO_2-SiO_2 films for ultraviolet laser writing of channel waveguides and Bragg gratings2003
Author(s)
Takahashi, M., Sakoh, A., Ichii, K., Tokuda, T., Yoko, T., Nishii, J.
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Journal Title
Appl.Opt. 42(42)
Pages: 4594-4598
Description
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[Journal Article] Photochemical reaction of Ge^<2+> in germanosilicate glasses under intense near-UV laser excitation2002
Author(s)
Takahashi, M., Ichii, K., Tokuda, Y., Uchino, T., Nishii, J., Fujiwara, T., Yoko, T.
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Journal Title
J.Appl.Phys. 92
Pages: 3442-3446
Description
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