2004 Fiscal Year Final Research Report Summary
Novel Organic Optical Devices Using Optical Poling
| Project/Area Number |
15350109
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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 |
Functional materials/Devices
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| Research Institution | Kyoto Institute of Technology |
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Principal Investigator |
TSUTSUMI Naoto Kyoto Institute of Technology, Dept.of Polym.Sci.& Eng., Professor, 繊維学部, 教授 (50172036)
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| Co-Investigator(Kenkyū-buntansha) |
SAKAI Wataru Kyoto Institute of Technology, Dept.of Polym.Sci. & Eng., Lecturer, 繊維学部, 講師 (70263176)
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| Project Period (FY) |
2003 – 2004
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| Keywords | Optical poling / Self phase matching / pico second laser / Χ^<(2)> diffraction gratings / Χ^<(2)> holography |
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| Research Abstract |
In 2003, we investigated new approach of the formation of volume holographic Χ^<(2)> gratings induced in polymeric materials by an all-optical poling based on the irradiation of the interference beams between fundamental (ω) and frequency doubled (2ω) ones. The sample optically poled by the interference beams produced the diffracted 2ω light by the irradiation of ω beam. The result indicates that the volume holographic Χ^<(2)> gratings were fabricated by the non-collinear all optical poling in the polymeric materials.
In 2004, we presented the first report on Χ^<(2)> polarization induced in molecular glass of conjugated compound by an all-optical poling. Transparent thin film of molecular glass of 1,4-bis[2-[4-[N,N-di(p-tolyl)amino]phenyl] vinyl]benzene (BTAPVB) was prepared using a spin-cast technique. Dipolar as well as octupolar components in BTAPVB contributed to the formation of photoinduced Χ^<(2)> polarization. Growth rate of Χ^<(2)> polarization has good linear relation with E_ω^4E_<2ω>, which suggested that the simultaneous processes of two-photon (ω+2ω) and three-photon (ω+ω+ω) excitation on the same electronic level contributed to the formation of photoinduced Χ^<(2)> polarization.
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