| Project/Area Number |
07455266
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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 | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
YOKO Toshinobu Kyoto University Institute For Chemical Research Professor, 化学研究所, 教授 (90158353)
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| Co-Investigator(Kenkyū-buntansha) |
LIN Hong Kyoto University Institute For Chemical Research Research Associate, 化学研究所, 助手 (10283665)
UCHINO Takashi Kyoto University Institute For Chemical Research Research Associate, 化学研究所, 助手 (50273511)
KOZUKA Hiromitsu Kyoto University Institute For Chemical Research Associate Prof., 化学研究所, 助教授 (80178219)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1995: ¥6,000,000 (Direct Cost: ¥6,000,000)
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| Keywords | Nonlinear optical materials / Heavy metal oxide / transition metal oxide / THG method / Z-scan method / Oxide-coating film / Sol-gel method / Second hyperpolarizability |
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| Research Abstract |
In this research, we have investigated the nonlinear optical properties of melt-derived oxide glasses containing transition metals and sol-gel derived transition metal oxide films with and without d-electrons by means of the third harmonic generation (THG) method and Z-scan method aiming at designing novel inorganic nonlinear optical materials.
First, we assembled the Z-scan optics by using the CCD detector which were purchased. Since it can detect four channel signals at the same time and at the high S/N ratio, the CCD detector made it possible to measure the reliable data in a very short time. From the THG measurements on the sol-gel derived transition metal oxide films with or without heavy metal oxides, Fe^<3+> and Pb^<2+> ions were found to have high second-order hyperpolarizabilities. Using various iron oxide, effects of oxidation states and coordination states of iron, and crystal structure on the second-order hyperpolarizability (gamma) were investigated. The higher the oxidation state (Fe^<2+> * Fe^<3+> * Fe^<4+>) and the lager the coordination number (4 * 6), the larger the second-order hyperpolarizability (gamma). Using l.9m laser light as a incident beam, a conspicuous red THG signal were observed for TiO_2 (ll0) single crystal under the phase matching condition. The effects of d- electron on the nonlinear optical properties of transition metal oxide-containing TeO2 glasses were investigated. The results were explained based on the modified bond orbital theory originally proposed by Lines.
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