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2003 Fiscal Year Final Research Report Summary

Fabrication of serially-grafted optical wave guide of organic functional crystal and polymer

Research Project

Project/Area Number 13450025
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied optics/Quantum optical engineering
Research InstitutionTohoku University

Principal Investigator

KAINO Toshikuni  TOHOKU UNIVERSITY, Institute of Multidisciplinary Research for Advanced Materials, Professor, 多元物質科学研究所, 教授 (00281709)

Co-Investigator(Kenkyū-buntansha) OKAMOTO Etsuya  TOHOKU UNIVERSITY, Institute of Multidisciplinary Research for Advanced Materials, Research Associate, 多元物質科学研究所, 助手 (50312682)
KOMATSU Kyoji  TOHOKU UNIVERSITY, Institute of Multidisciplinary Research for Advanced Materials, Research Associate, 多元物質科学研究所, 助手 (90261502)
Project Period (FY) 2001 – 2003
KeywordsSerially Grafted Structure / Photobleaching / Reactive Ion Etching / Optical Waveguide / Refractive Index / Optical Loss
Research Abstract

Organic crystal optical waveguides are promising device for practical photonic applications though because of their large optical loss, they should be serially grafted with transparent polymer waveguides. Among a variety of organic crystals we investigated an organic salt, 4-N, N-dimethylamino-4'-N-methyl-stilbazorium tosylate, DAST, an a promising functional crystal. It is of particular interest because its largest NLO coefficient d_<11> is 〜540V and electro-optic (EO) coefficient r_<11> is 〜55pm/V (λ=1.54μm). DAST crystal is relatively hard to fabricate optical waveguide because it is very easy to dissolve into organic solvents as well as in water. This is very critical because the selection of the waveguide fabrication methods will be limited.
So we had used special lift off method to fabricate a serially grafted optical waveguide of DAST and transparent polymer. Based on the photolithography and reactive ion etching technology, we had succeeded to fabricate a serially grafted struct … More ure of the waveguide, for the first time as far as the combined waveguide of crystal and polymer. As far as NLO organic crystal waveguide concerns, only two molecular crystals that are usually insoluble in water were reported, though their loss was large, larger than 20dB/cm. In the case of the DAST, loss was around 10dB/cm and 〜6dB/cm with serially grafted structure of 5 mm long DAST. DAST serially grafted waveguide was also fabricated using photobleaching. We had already reported that the DAST crystal is photo-bleachable based on photo-isomerization and photodecomposition. So as a polymer waveguide, we had selected azobenzene-dye containing transparent polymer to photobleach. After synthesizing novel polyarylether with azo-dye, we have fabricated a serially grafted waveguide of DAST and the polyarylether. We had succeeded to fabricate it using this simple photobleaching technology.
In conclusion, a serially grafted organic functional crystal and transparent polymer was successfully fabricated for the time as far as we know. The waveguide of the DAST crystal and polymer is expected to apply for functional optical circ in optical telecommunication system. Less

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] K.Takayama: "Serially Grafted Waveguide Fabrication of Organic Crystal and Transparent Polymer"Japan J.Applied Physics. 40(8)part1. 5149-5150 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] B.Cai: "Refractive Index Control and Grating Fabrication of 4'-N, N-dimethylamino-N-methyl-4-stilbazolium Tosylate Crystal"Japan J.Applied Physics. 40(9)Part2. 964-966 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Kaino: "Fabrication of Nonlinear Optical Waveguide"Ferroelectrics. 257. 13-26 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Ushiwata: "Development of Thermally Stable Novel EO-polymers"Molecular Crystals and Liquid Crystals. 374. 303-314 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Komatsu: "Waveguide Fabrication of 4-(4-Dimethylaminostyryl)-1-Methylpyridium Tosylate (DAST) Crystal"IEICE Trans.Electron. E85-C(6). 1258-1263 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Kaino: "Fabrication of DAST Channel Optical Waveguides"Advanced Functional Materials. 12(9). 599-603 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 戒能俊邦: "高分子科学と光物理学とのキャッチボール、光導波路の新展開"(株)エヌ・ティー・エス. 26 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Takayama: "Serially Grafted Waveguide Fabrication of Organic Crystal and Transparent Polymer"Japan J. Applied Physics. 408(8)part 1. 5149-5150 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] B.Cai: "Refractive Index Control and Grating Fabrication of 4'-N, N-dimethylamino-N-methyl-4-stilbazolium Tosylate Crystal"Japan J. Applied Physics. 40(9)Part 2. 964-966 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toshikuni Kaino: "Fabrication of Nonlinear Optical Waveguide"Ferroelectrics. 257. 13-26 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ushiwata: "Development of Thermally Stable Novel EO-polymers"Molecular Crystals and Liquid Crystals. 374. 303-314 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Komatsu: "Waveguide Fabrication of 4-(4-Dimethylaminostyryl)-1-Methylpyridium Tosylate (DAST) Crystal"IEICE Trans.Electron.. E85-C(6). 1258-1263 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Kaino: "Fabrication of DAST Channel Optical Waveguides"Advanced Functional Materials. 12(9). 599-603 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Kaino: "Catchall between Polymer Science and Optical Physics : New Trends of Optical Waveguide (Ed. The Society of Polymer Science, Japan)"NTS Inc.. 26 (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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