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Epitaxial Growth of Non-Equilibrium Crystals and their Exciton Spectra

Research Project

Project/Area Number 09640391
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 InstitutionShinshu University

Principal Investigator

ITOH Minoru  Shinshu University, Faculty of Engineering, Professor, 工学部, 教授 (80126664)

Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1998: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1997: ¥2,300,000 (Direct Cost: ¥2,300,000)
KeywordsEpitaxial Growth / Optical Spectra / Non-Equilibrium Crystal / Insulating Crystal / Exciton / Optoelectronics
Research Abstract

1. A new vacuum chamber was constructed for epitaxial growth of non-equilibrium ionic crystals.
2. By using a RbBr (100) crystal surface cleaved in vacuum as a substrate, NaCl-structured CsI thin films were successfully grown on it.
3. CsCI-structured CsI thin films were also prepared on a RbI single crystal cleaved in vacuum.
4. The thickness of both films was about 5 nm.
5. Both films were found to show sharp exciton bands of NaCl- and CsCl-types in the absorption spectra, respectively.
6. Luminescence properties, especially decay profile, of some samples were investigated under the excitation with a Nd : YAG laser purchased by the present Grant-in-Aid.
7. The PbF_2 crystal has two different structural modifications even at normal condition ; cubic and orthorhombic. Several kinds of optical spectra of both phases were studied. A part of the obtained results have been already published or accepted for publication.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] M.Itoh et al.: "Ultraviolet Photoemission Studies of Valence Bands in Lead halides" J.Phys.Soc.Jpn.67/6. 2140-2141 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Itoh et al.: "Photoluminescence of Orthorhombic and Cubic PbF_2 Single Crystals" J.Phys.:Condens.Matter. (掲載決定). (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Fujita et al.: "Exciton Transition of Orthorhombic and Cubic PbF_2" J.Phys.Soc.Jpn.67/9. 3320-3321 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Itoh et al.: "Ultraviolet Photoemission Studies of Valence Bands in Lead Halides" J.Phys.Soc.Jpn.67-6. 2140-2141 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Fujita et al.: "Exciton Transition of Orthorhomic and Cubic PbF_2" J.Phys.Soc.Jpn.67-9. 3320-3321 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Itoh et al.: "Photoluminescence of Orthorhombic and Cubic PbF_2 Single Crystals" J.Phys : Condens.Matter. (in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Itoh et al.: "Ultraviolet Photoemission Studies of Valence Bands in Lead halides" J.Phys.Soc. Jpn.67/6. 2140-2141 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.ltoh et al.: "Photoluminescence of Orthorhombic and Cubic PbF_2 Single Crystals" J.Phys. : Condens. Matter. 掲載決定. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Fujita et al.: "Exciton Transition of Orthorhombic and Cubic PbF_2" J.Phys. Soc.Jpn.67/9. 3320-3321 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Itoh et al.: "Temperature Dependence of Auger-Free Luminescence in Alkali and Alkaline-Earth.Halides" J.Phys.Soc.Jpn.66/8. 2502-2512 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] S.Hashimoto et al.: "Alloying Effect on the n=1 and n=2 Excitons in Mixed K_<1-x>Rb_xI Crystals" J.Phys.Soc.Jpn.67/2. 670-674 (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2020-05-15  

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