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1999 Fiscal Year Final Research Report Summary

Ultrafast microspectroscopy of wide band-gap semiconductor nanocrystals.

Research Project

Project/Area Number 10490004
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 広領域
Research InstitutionOsaka University

Principal Investigator

EDAMATSU Keiichi  Graduate School of Engineering Science, Osaka University, Associate Professor, 基礎工学研究科, 助教授 (10193997)

Co-Investigator(Kenkyū-buntansha) ITOH Tadashi  Graduate School of Engineering Science, Osaka University, Professor, 基礎工学研究科, 教授 (60004503)
Project Period (FY) 1998 – 1999
KeywordsNanocrystal / Quantum dot / Semiconductor nanostructure / Microspectroscopy / Ultrafast spectroscopy / Single quantum dot
Research Abstract

We have investigated various optical properties of semiconductor nanocrystals (quantum dots) including I-VII (CuCl), II-VI (CdSe/ZnCdSe), and III-V (GaAs/AlGaAs) materials. Especially, ultrafast dynamics of an exciton and exciton complexes confined in a single quantum dot have been investigated by means of time-resolved micro-photoluminescence spectroscopy. Topics of this research are listed below.
1. Non-markovian relaxation of excitons confined in CuCl quantum dots.
2. Transient excited-state absorption of CuCl quantum dots.
3. Two-photon excitation spectroscopy of CuCl quantum dots.
4. Micro-photoluminescence spectroscopy of single CuCl quantum dots.
5. Time-resolved micro-photoluminescence spectroscopy of single ZnCdSe quantum dots.
6. Homogeneous linewidth of the resonant luminescence of CuCl quantum dots.
7. Micro-photoluminescence and multiexciton states of a single GaAs quantum dots.

  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] K. Edamatsu: "Resonant secondary emission of CuCl quantum dots under two-photon excitation"Excitonic Processes in Condensed Matter, The Electrochemical Society Proceedings Volume. 98-25. 259-261 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Uozumi: "Excited-state absorption of excitons confined in spherical quantum dots"Physical Review B. 59. 9826-9829 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Edamatsu: "Two-photon excitation spectra of confined excitons in CuCl nanocrystals"Physical Review B. 59. 15868-15871 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Edamatsu: "Micro-photoluminescence spectroscopy of CuCl quantum dots in thin NaCl crystals"Journal of Luminescence. (印刷中). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Yamanaka: "Excited-state absorption of excitons confined in CuCl quantum dots"Journal of Luminescence. (印刷中). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Edamatsu: "Non-markovian relaxation of excitons confined in CuCl quantum dots studied by resonant secondary emission"Physica Status Solidi (b). 178(印刷中). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] B. P. Zhang: "Time-resolved photoluminescence of ZnCdSe single quantum dots"Journal of Crystal Growth. (印刷中). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Edamatsu, T. Itoh, B. P. Zhang, and Y. Segawa: "Resonant Secondary Emission of CuCl Quantum Dots under Two-Photon Excitation."The Electrochemical Society Proceedings. Volume 98-25. 259-261 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Uozumi, Y. Kayanuma, K. Yamanaka, K. Edamatsu, and T. Itoh: "Excited-state absorption of excitons confined in spherical quantum dots."Physical Review B. 59. 9826-9829 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Edamatsu, K. Hisakawa, and T. Itoh: "Two-photon excitation spectra of confined excitons in CuCl nanocrystals."Physical Review B. 59. 15868-15871 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Edamatu, C. Watatani, and T. Itoh: "Micro-photoluminescence spectroscopy of CuCl quantum dots in thin NaCl crystals."Journal of Luminescence. (in press.). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Yamanaka, K. Edamatsu, and T. Itoh: "Excited-state absorption of excitons confined in CuCl quantum dots."Journal of Luminescence. (in press.). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Edamatsu, C. Watatani, and T. Itoh: "Non-markovian relaxation of excitons confined in CuCl quantum dots studied by resonant secondary emission."Physica Status Solidi(b). 178 (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] B. P. Zhang, Y. Q. Li, T. Yasuda, Y. Segawa, K. Edamatsu, and T. Itoh: "Time-resolved photoluminescence of ZnCdSe single quantum dots."Journal of Crystal Growth. (in press.). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Edamatsu, T. Itoh, K. Matsuda, and S. Saikan: "Homogeneous linewidths of the resonant luminescence spectra of CuCl quantum dots."Technical Digest of the Quantum Electronics and Laser Science Conference 2000. (in press.).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C. Watatani, K. Edamatsu, T. Itoh, H. Hayashi, S. Shimomura, and S. Hiyamizu: "Micro-photoluminescence of single GaAs/AlGaAs quantum dots grown on a (411) A GaAs surface."Technical Digest of the Quantum Electronics and Laser Science Conference 2000. (in press.).

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

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Published: 2001-10-23  

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