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Photocalorimetric Spectroscopy of Excitons in Semiconductor-Energy Dissipation Processes of Photo-excited States-

Research Project

Project/Area Number 10640308
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 InstitutionOKAYAMA UNIVERSITY

Principal Investigator

ARIMOTO Osamu  Okayama University, Faculty of Science, Associate Professor, 理学部, 助教授 (70193092)

Co-Investigator(Kenkyū-buntansha) KONDO Yasuhiro  Tohoku University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (20013534)
NAKAMURA Kaizo  Okayama University, Faculty of Science, Professor, 理学部, 教授 (40025359)
Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1999: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1998: ¥2,700,000 (Direct Cost: ¥2,700,000)
Keywordsexciton / zinc diphosphide / photocalorimetric spectroscopy / phonon / nonradiative relaxation process / excitation spectrum / luminescence / exciton-phonon scattering / 無幅射緩和過程
Research Abstract

In order to clarify nonradiative relaxation processes of excitons due to exciton-phonon scattering, simultaneous measurements of photocalorimetric (PC) spectra and excitation spectra of exciton luminescence have been performed in a semiconductor crystal β-ZnP_2, which is one of the most suitable materials for the exciton study. The main results obtained are as follows :
1. For singlet excitons, power of the light absorbed by the crystal is converted to that of the thermal heating of the crystal almost at an equal rate, which amounts to nearly 80%, in the energy range from the 1s longitudinal exciton energy E_L to the band gap energy E_g.
2. The amounts of both singlet exciton luminescence and heat generation decrease in the 1s reflection band, which suggests the presence of other optical process such as resonant Rayleigh scattering in this energy region.
3. The ratio of the PC signal to the luminescence intensity is enhanced at the exciton resonances n=1 to 4. This fact indicates that the rate of the nonradiative decay of excitons relative to the emission of the luminescence is large at the exciton resonances.
4. The PC spectrum under excitation into the triplet exciton resonance region with E//b resembles fairly well the absorption spectrum of the triplet exciton besides unknown background. This fact indicates that, if the background is neglected, the absorbed light to create the triplet excitons is converted to the heat generation almost at a constant rate.
The results mentioned above were presented at the International Conference on Luminescence and Optical Spectroscopy of Condensed Matter held in the last summer and also at meetings of the Physical Society of Japan.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (43 results)

All Other

All Publications (43 results)

  • [Publications] K.Nakamura: "Triplet-to-Singlet Conversion in the Exciton System in β-ZnP_2"J.Phys.Soc.Jpn.. 67. 1890-1893 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Nakamura: "Intersystem Spin Conversion of Excitons in β-ZnP_2"The Electrochemical Society Proceedings Series. 98-25. 456-464 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] O.Arimoto: "Combination of Synchrotron Radiation and Laser for Two-Photon Spectroscopy of BaF_2"J.Electron Spectrosc.Relat.Phenom.. 92. 219-223 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Kamada: "Combined System of SR and Laser for Solid-State Research"J.Synchrotron Rad.. 5. 1035-1038 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S.Asaka: "Time-Gated Photon Counting Method for Two-Photon Spectroscopy Using Synchrotron Radiation and Laser"Rev.Sci.Instrum.. 69. 1931-1933 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Kamada: "Simultaneous Measurements of Photoelectron and Luminescence of Barium Halides"J.Electron Spectrosc.Relat.Phenom.. 88-91. 297-301 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] O.Arimoto: "Two-Photon Spectroscopy of Excitons in BaF_2 by Combinational Use of Synchrotron Radiation and Laser"UVSOR Activity Report. 25. 116-117 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Kamada: "Simultaneous Measurements of Photoelectron and Luminescence of Barium Halides and Laser"UVSOR Activity Report. 25. 156-157 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] O.Arimoto: "Lifetimes of Singlet and Triplet Excitons in β-ZnP_2"J.Phys.Soc.Jpn.. 68. 2139-2143 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T.Tsujibayashi: "Resonant enhancement effect on two-photon absorption due to excitons in alkaline-earth fluorides excited with synchrotron radiation and laser light"Phys.Rev.. B60. R8442-R8445 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 鎌田雅夫: "放射光とレーザーの組み合わせによる固体・表面研究"放射光学会誌. 12. 48-55 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S.Asaka: "Construction of Nonlinear Spectroscopic System using CW Mode-Locked Ti : Sapphire Laser Synchronized with Synchrotron Radiation"UVSOR Activity Report. 26. 34-35 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T.Tsujibayashi: "Two-Photon Spectroscopy of Excitons in CaF_2 by Using Synchrotron Radiation and Laser"UVSOR Activity Report. 26. 58-59 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Watanabe: "Self-Trapped Exciton Luminescence in BaF_2 Stimulated under Simultaneous Irradiation of Synchrotron Radiation and Laser"UVSOR Activity Report. 26. 66-67 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T.Tsujibayashi: "Two-photon excitation spectra of exciton luminescence in CaF_2 by using synchrotron radiation and laser"J.Lumin.. 87-89. 254-256 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] O.Arimoto: "Photocalorimetric spectroscopy of excitons in β-ZnP_2"J.Lumin.. 87-89. 284-286 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Nakamura: "Triplet-to-Singlet Conversion in the Exciton System in β-ZnP_2"J.Phys.Soc.Jpn.. 67. 1890-1893 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Nakamura: "Intersystem Spin Conversion of Excitons in β-ZnP_2"The Electrochemical Society Proceedings Series. 98-25. 456-464 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] O.Arimoto: "Combination of synchrotron radiation and laser for two-photon spectroscopy of BaF_2"J.Electron Spectrosc.Relat.Phenom.. 92. 219-223 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Kamada: "Combined system of SR and Laser for Solid-State Research"J.Synchrotron Rad.. 5. 1035-1037 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S.Asaka: "Time-Gated Photon Counting Method for Two-Photon Spectroscopy Using Synchrotron Radiation and Laser"Rev.Sci.Instrum.. 69. 1931-1933 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Kamada: "Simultaneous Measurements of Photoelectron and Luminescence of Barium Halides"J.Electron Spectrosc.Relat.Phenom.. 88-91. 297-301 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] O.Arimoto: "Two-Photon Spectroscopy of Excitons in BaF_2 by Combinational Use of Synchrotron Radiation and Laser"UVSOR Activity Report. 25. 116-117 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Kamada: "Simultaneous Measurements of Photoelectron and Luminescence of Barium Halides"UVSOR Activity Report. 25. 156-157 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] O.Arimoto: "Lifetimes of Singlet and Triplet Excitons in β-ZnP_2"J.Phys.Soc.Jpn.. 68. 2139-2143 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T.Tsujibayashi: "Resonance enhancement effect on two-photon absorption due to excitons in alkaline-earth fluorides excited with synchrotron radiation and laser light"Phys.Rev.. B60. R8442-R8445 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Kamada: "Combination of Synchrotron Radiation and Lasers for Solid- and Surface Researches (in Japanese)"J.Jpn.Soc.Synchrotron Radiation Research. 12. 48-55 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S.Asaka: "Construction of Nonlinear Spectroscopic System using CW Mode-Locked Ti : Sapphire Laser Synchronized with Synchrotron Radiation"UVSOR Activity Report. 26. 34-35 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T.Tsujibayashi: "Two-Photon Spectroscopy of Excitons in CaF_2 by Using Synchrotron Radiation and Laser"UVSOR Activity Report. 26. 58-59 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Watanabe: "Self-Trapped Exciton Luminescence in BaF_2 Stimulated under Simultaneous Irradiation of Synchrotron Radiation and Laser"UVSOR Activity Report. 26. 66-67 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T.Tsujibayashi: "Two-Photon Spectroscopy of Excitons in CaF_2 by Using Synchrotron Radiation and Laser"J.Lumin.. 87-89. 254-256 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] O.Arimoto: "Photocalorimetric spectroscopy of excitons in β-ZnP_2"J.Lumin.. 87-89. 284-286 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] O. Arimoto: "Lifetimes of Singlet and Triplet Excitons in β-ZnP_2"J. Phys: Soc. Jpn.. 68・6. 2139-2143 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] T. Tsujibayashi: "Resonant enhancement effect on two-photon absorption due to excitons in alkaline-earth fluorides exeited with synchrotron radiation and laser light"Phys. Rev. B. 60・12. R8442-R8445 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 鎌田 雅夫: "放射光とレーザーの組み合わせによる固体・表面研究"日本放射光学会誌. 12・1. 48-55 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] O. Arimoto: "Photocalorimetric spectroscopy of excitons in β-ZnP_2"J. Lumin.. (印刷中). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Nakamura: "Triplet-to-Singlet Conversion in the Exciton System in B-Znp_2" J.Phys.Soc.Jpn.67-6. 1890-1893 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Kamada: "Combined System of SR and Laser for Solid-State Resarch" J.Synchrotron Rad.5. 1035-1037 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] O.Arimoto: "Combination of Synchrotron Radiation and Laser for Two-Photon Spectroscopy" J.Electron Spectrose.Relat.Phenom.92. 219-223 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] S.Asaka: "Time-Gated Photon Counting Metod for Two-Photon Spectroscopy Using Synchrotron Radiation and Laser" Rev.Sci.Instrum.69-5. 1931-1933 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Kamada: "Simultaneous Measurements of Photoelectron and Luminescence of Barium Halides" J.Electron Spectrose.Ralat.Phenom.88-91. 297-301 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] O.Arimoto: "TWO-Photon Spectroscopy of Excitons in BaF_2 by Combinational Use of Synchrotron Radiation and Laser" UVSOR Activity Report. 25. 116-117 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Kamada: "Simultaneous Measurements of Photoelectron and Luminescence of Barium Halides" UVSOR Activity Report. 25. 156-157 (1998)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2020-05-15  

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