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Dynamics in disordered materials probed through optical spectra

Research Project

Project/Area Number 08640417
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅰ(光物性・半導体・誘電体)
Research InstitutionOsaka University

Principal Investigator

KANEMATSU Yasuo  Osaka University, Department of Physics., Research Assistant, 大学院・理学研究科, 助手 (00211855)

Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1997: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1996: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywordsdisorder / glass / resonant fluorescence / dynamics / laser spectroscopy / Raman scattering / ダイナミクス / レーザー
Research Abstract

From the resonance fluorescence spectra measured for dye molecules in organic molecular glasses at low temperatures, we determined the density of states of vibrational host modes weighted by the electron-phonon coupling strength for each sample. The normalized shape of this weighted density of states was found to exhibit the quantitatively universal feature which coincides with that obtained for dye-doped organic and inorganic amorphous polymers, though the nature of disorder is widely varied among the materials. Raman scattering spectra were also measured for host glasses at low temperatures. Although the same kind of materials showed similar spectral shapes, remarkable difference was found among the groups of materials. These results indicate crucial importance of classifying types of vibrational modes in order to clarify the low-frequency dynamics of disordered materials and also suggest that a certain class of dynamics shows universality, the origin of which should be clarified in the future study.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 兼松 泰男: "Latlice dynamics in disordered materials probed through optical responses" Journal of Luminescence. (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 兼松 泰男(共著): "Optical Properties of Low-Dimensional Materials Vol.2" World Scientific, 450 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yasuo Kanematsu: "Lattice dynamics in disordered materials probed through optical responses" Journal of Laminescence. (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yasuo Kanematsu: "Lattice dynamics in disordered materials" in "Optical Properties of Low-Dimensional Materials Vol.2" edited by T.Ogawa and Y.Kanematsu. World Scientific, (in press), (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 兼松泰男: "Lattice dynamics in disordered materials probed through optical responses" Journal of Luminescence. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 兼松泰男(共著): "Optical Properties of Low-Dimentional Materials Vol.2" World Scientific, 450 (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1996-04-01   Modified: 2020-05-15  

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