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1986 Fiscal Year Final Research Report Summary

Photo Induced Ultra Fast Structure Change.

Research Project

Project/Area Number 60302022
Research Category

Grant-in-Aid for Co-operative Research (A)

Allocation TypeSingle-year Grants
Research Field 物性一般(含極低温・固体物性に対する理論)
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

HIRAI Masamitsu  Faculty of Engineering, Tohoku University, 工学部, 教授 (90004275)

Co-Investigator(Kenkyū-buntansha) OHKURA Hiroshi  Faculty of Engineering, Osaka City University, 工学部, 教授 (50046801)
NAKAI Yoshio  Faculty of Science, Kyoto University, 理学部, 教授 (80025220)
ITOH Noriaki  Faculty of Science, Nagoya University, 理学部, 教授 (90022996)
KOBAYASHI Koichi  Faculty of Education, Toyama University, 教養部, 教授 (80013457)
TOYOZAWA Yutaka  ISSP, The University of Tokyo, 物性研究所, 教授 (50013454)
Project Period (FY) 1985 – 1986
KeywordsPhoto-induced / Ultra-fast / Structure change / Excitons / Color centers / 緩和過程
Research Abstract

In 1985, the meeting to investigate the present status and problems on the project was held at Nasuno, Oct. 5th and 6th. We discussed on the relaxation, the lattice defect formation (color centers) after the relaxation of self trapped excitons and luminescence in alkali halide crystals, in Cd halide crystals, in alkali-silver halide crystals, in aromatic compound crystals, in semiconductor crystals and in amorphous semicondors. The direction of the research work in two years was also discussed.
In 1986, the meeting to conclude the work for two years was held at Fuji Educational meeting center, January 12th - 14th, 1987. The materials we investigated in two years were alkali halide, its mixtured crystals, layered crystals ( <InI_2> ), silver halide crystals, amolphous semiconductors, chalcogenide semiconductors, compound semiconductors, organic crystals and dyes. The free excitons, the relaxation of excitons, the defect formation, the relaxation of electrons in color centers and impurities, the photoinduced crystalization, the secondary photo-emission were discussed. By these investigations, a lot of information on the relaxation processes and the defect formation were obtained. These results present basic idea on the photo- induced ultrafast structure change, and contribute the fundamental and applicatory suggestion on the field investigated.

  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] S.Wakita;M.Washio;Y.Suzuki;M.Hirai: J.J.A.P.24. 502-505 (1985)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Tanino;N.Koshizuka;K.Kobayashi;M.Yamashita;K.Hoh: J.Phys.Soc.Jpn.54. 483-486 (1985)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Noriaki Itoh;Katsumi Tanimura: Radiat.Eff.98. 269-287 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] O.Arimoto;K.Sasaki;K.Kanno;Y.Nakai: J.Phys.Soc.Jpn.54. 3188-3194 (1985)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Muramatsu;N.Akiyama;Y.Mori;H.Ohkura: J.Phys.Soc.Jpn.55. 2811-2822 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Watanabe;T.Karasawa;T.Komatsu;Y.Kaifu: J.Phys.Soc.Jpn.55. 897-907 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Wakita, M. Washio, Y. Suzuki and M. Hirai: "Picosecond Pulse Sources by Cerenkov Light Generated from Fused Silica and Water." J. J. A. P.24. 502-505 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Tanino, N. Koshizuka, K. Kobayashi, M. Yamashita and K. Hoh: "Pressure Dependence of Optical Properties in Wolffram's Red Salt." J. Phys. Soc. Jpn.54. 483-486 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Noriaki Itoh and Katsumi Tanimura: "Radiation Effects in Ionic Solids." Radiat. Eff.98. 269-287 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] O. Arimoto, K. Sasaki, K. Kanno and Y. Nakai: "Transient Absorption of Hetero-Nuclear Relaxed Excitons in RbCl: <I> ." J. Phys. Soc. Jpn.54. 3188-3194 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Muramatsu, N. Akiyama, Y. Mori and H. Ohkura: "The Spin-Mixing Parameters in the Optical Pumping Cycle of the F Centers in KBr and KI." J. Phys. Soc. Jpn.55. 2811-2822 (1986)

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

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Published: 1988-11-09  

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