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Dynamical Processes of Electron-Spin Systems Photo-Excited in Semiconductor Quantum Dots

Research Project

Project/Area Number 14204030
Research Category

Grant-in-Aid for Scientific Research (A)

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

ITOH Tadashi  Osaka University, Graduate School of Engineering Science, Professor, 基礎工学研究科, 教授 (60004503)

Co-Investigator(Kenkyū-buntansha) EDAMATSU Keiichi  Tohoku University, Research Institute of Electrical Communication, Professor, 電気通信研究所, 教授 (10193997)
ASHIDA Masaaki  Osaka University, Graduate School of Engineering Science, Associate Professor, 基礎工学研究科, 助教授 (60240818)
MIYAJIMA Kensuke  Osaka University, Graduate School of Engineering Science, Research Associate, 基礎工学研究科, 助手 (20397764)
Project Period (FY) 2002 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥55,900,000 (Direct Cost: ¥43,000,000、Indirect Cost: ¥12,900,000)
Fiscal Year 2005: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2004: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Fiscal Year 2003: ¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
Fiscal Year 2002: ¥25,740,000 (Direct Cost: ¥19,800,000、Indirect Cost: ¥5,940,000)
KeywordsCuCl / semimagnetic-semiconductor / quantum dot / spin dynamics / confined exciton / biexciton / magneto-optics / spin-triplet exciton / 分子線エピタキシー / 位相緩和 / 励起子 / 磁気円二色性 / 位相緩和時間 / 磁気円2色性
Research Abstract

The purpose of this project is (1) to know the singlet-triplet spin conversion of quantum-confined excitons and the relaxation dynamics of confined exciton magnetic polarons in non-magnetic and magnetic semiconductors and (2) also to approach to new kinds of phenomena inherent to confined exciton-spin complex systems. The materials are CuCl semiconductor quantum dots and mixed crystals of CdMnTe semi-magnetic semiconductor. In the latter system, excions are confined in alloy potential wells, that is, naturally grown quantum dots.
1. Confined excitons inCuCl quantum dots : (1) In the magneto-luminescence spectra at 4K, it has been found that the intensity enhancement and the spectral modification of the localized exciton luminescence occur both under Faraday and Voigt geometries. These results clearly show that, due to the exciton confinement, the optical transition to/from the spin-triplet state (dark exciton state) is partially allowed and the mixing occurs between the longitudinal and … More transverse excitons. (2) By means of two-photon resonance excitation into biexciton states, there has been found the stable J=2 state which corresponds to the spin-triplet state of biexciton. Furthermore, the J=0 biexciton shows very efficient lasing which comes from the superradiant nature of the biexciton. (3) The measurement of temporal behavior and temperature dependence of the magneto-luminescence and absorption may clarify the role and the dynamics of spin-triplet excitons confined in their translational motion.
2. Locally confined excitons in CdMnTe : (1) Under the intense, selective excitation of locally confined excitons in alloy potential wells, there has been found a new nonlinear luminescence band which shows giant magneto-optical effects and ultra-fast decay. The luminescence and their spin memory may be related with a certain many-body effect of localized exciton magnetic polarons. (2) It is necessary to clarify the ultra-fast relaxation processes of the correlated electron-spin systems through the measurement of transient absorption and their magnetic field dependence. Less

Report

(5 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (51 results)

All 2006 2005 2004 2003 2002 Other

All Journal Article (37 results) Book (1 results) Publications (13 results)

  • [Journal Article] Nano-scale distribution of ZnO free exciton luminescence in ZnO : Zn microcrystals and its modification under electron beam excitation2006

    • Author(s)
      M.Ichimiya
    • Journal Title

      J.Phys.Condens.Matter 18

      Pages: 1967-1975

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Nano-scale distribution of ZnO free exciton luminescence in ZnO:Zn microcrystals and its modification under electron beam excitation2006

    • Author(s)
      M.Ichimiya
    • Journal Title

      J.Phys.Condens.Matter vol.18

      Pages: 1967-1975

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Nano-scale distribution of ZnO free exciton luminescence in ZnO : Zn microcrystals and its modification under electron beam excitation2006

    • Author(s)
      M.Ichimiya
    • Journal Title

      J.Physi : Condens.Matter 18

      Pages: 1967-1975

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Growth of CuCl nanostructures on CaF_2(111) substrates by MBE-their morphology and optical spectra-2005

    • Author(s)
      A.Kawamori
    • Journal Title

      J.Crystal Growth 237-239

      Pages: 1615-1619

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Two-photon Excitation of Confined Biexcitons in CuCl Quantum Dots2005

    • Author(s)
      K.Miyajima
    • Journal Title

      Physica E 26

      Pages: 33-36

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Stable Biexcitonic Lasing of CuCl Quantum Dots Under Two-Photon Resonant Excitation2005

    • Author(s)
      G.Oohata
    • Journal Title

      Physica E 26

      Pages: 347-350

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Two-photon absorption and lasing due to biexciton in CuCl quantum dots2005

    • Author(s)
      Y.Kagotani
    • Journal Title

      J.Luminescence 112

      Pages: 113-116

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Luminescence of Epitaxial Sub-monolayer CdSe Nanostructures in ZnSe2005

    • Author(s)
      A.M.Kapitonov
    • Journal Title

      J.Luminescence 112

      Pages: 117-180

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Two-Photon Excitation of Confined Biexcitons in CuCl Quantum Dots2005

    • Author(s)
      K.Miyajima
    • Journal Title

      Physica E vol.26

      Pages: 33-36

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Stable Biexcitonic Lasing of CuCl Quantum Dots Under Two-Photon Resonant Excitation2005

    • Author(s)
      G.Oohata
    • Journal Title

      Physica E vol.26

      Pages: 347-350

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Two-photon absorption and lasing due to biexciton in CuCl quantum dots2005

    • Author(s)
      Y.Kagotani
    • Journal Title

      J.Luminescence vol.112

      Pages: 113-116

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Luminescence of Epitaxial Sub-monolayer CdSe Nanostructures in ZnSe2005

    • Author(s)
      A.M.Kapitonov
    • Journal Title

      J.Luminescence vol.112

      Pages: 117-180

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Twe-photon absorption and lasing due to biexciton in CuCl quantum dots2005

    • Author(s)
      Y.Kagotani
    • Journal Title

      J.Luminescence 112

      Pages: 113-116

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Luminescence of bound excitons in ZnO : Zn phosphor powders2005

    • Author(s)
      T.Hirai
    • Journal Title

      J.Luminescence 113

      Pages: 115-120

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Highly Efficient Biexcitonic Lasing of Semiconductor Quantum Dots under Resonant Two-Photon Excitation2005

    • Author(s)
      K.Miyajima
    • Journal Title

      IQEC/CLEO-PR, Technical Digest

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Enhancement of Degenerate Four-Wave Mixing Signal in CuCl Nanostructures with High Crystalline Quality2005

    • Author(s)
      M.Ichimiya
    • Journal Title

      IQEC/CLEO-PR, Technical Digest

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Two-Photon Excitation of Confined Biexcitons in CuCl Quantum Dots.2005

    • Author(s)
      K.Miyajima
    • Journal Title

      Physica E 26

      Pages: 33-36

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Stable Biexcitonic Lasing of CuCl Quantum Dots Under Two-Photon Resonant Excitation.2005

    • Author(s)
      G.Oohata
    • Journal Title

      Physica E 26

      Pages: 347-350

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Infrared transient absorption and excited-states of excitons and biexcitons confined in CuCl quantum dots2004

    • Author(s)
      K.Miyajima
    • Journal Title

      J.Luminescence 108

      Pages: 371-374

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Magneto-photoluminescence of novel magnetic semiconductor Zn_<1-x>CrXO grown by PLD method2004

    • Author(s)
      I.Saito
    • Journal Title

      Appl.Phys.A 79

      Pages: 1445-1447

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Optical properties of epitaxially grown submonolayer CdSe/ZnSe nanostructures2004

    • Author(s)
      A.M.Kapitonov
    • Journal Title

      Phys.Rev.B 70

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Infrared transient absorption and excited-states of excitons and biexcitons confined in CuCl quantum dots2004

    • Author(s)
      K.Miyajima
    • Journal Title

      J.Luminescence vol.108

      Pages: 371-374

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Magneto-photoluminescence of novel magnetic semiconductor Zn_<1-x>Cr_xO grown by PLD method2004

    • Author(s)
      I.Satoh
    • Journal Title

      Appl.Phys.A vol.79

      Pages: 1445-1447

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Optical properties of epitaxially grown submonolayer CdSe/ZnSe nanostructures2004

    • Author(s)
      A.M.Kapitanov
    • Journal Title

      Phys.Rev.B vol.70

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Infrared transient absorption and excited-states of excitons and biexcitons confined in CuCl quantum dots.2004

    • Author(s)
      K.Miyajima
    • Journal Title

      J.Luminescence 108

      Pages: 371-374

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Magneto-photoluminescence of novel magnetic semiconducotr Zn_<1-x>Cr_xO grown by PLD method.2004

    • Author(s)
      I.Satoh
    • Journal Title

      Appl.Phys.A 79

      Pages: 1445-1447

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Two-photon excitation of biexcitons and their lasing in semi-conductor quantum dots.2004

    • Author(s)
      K.Miyajima
    • Journal Title

      Tech.Digest of CLEO/IQEC

      Pages: 407-408

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Optical properties of epitaxially grown submonolayer CdSe/ZnSe nanostructures.2004

    • Author(s)
      A.M.Kapitanov
    • Journal Title

      Phys.Rev.B 70

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Epitaxial growth and characterization of CuCl nanostructures on CaF_2(111) substrate2003

    • Author(s)
      N.Yafune
    • Journal Title

      Proc.26th Intern.Conf.Phys.Semocond., Institute of Physics

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Anti-Stokes Luminescence of Magnetic Polarons in CdMnTe2003

    • Author(s)
      T.Okada
    • Journal Title

      Proc.26th Intern.Conf.Phys.Semocond., Institute of Physics

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Infrared transient absorption of excitons and biexcitons confined in CuCl quantum dots2003

    • Author(s)
      K.Miyajima
    • Journal Title

      phys.stat.sol.(c) Vol.0, No.4

      Pages: 1275-1278

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Exciton-phonon interaction in epitaxial CdSe/ZnSe nanostructures2003

    • Author(s)
      A.M.Kapitonov
    • Journal Title

      phys.stat.sol.(c) 238

      Pages: 317-320

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Epitaxial growth and characterization of CuCl nanostructures on CaF_2(111) substrate2003

    • Author(s)
      N.Yafune
    • Journal Title

      Proc.26th Intern.Conf.Phys.Semicond., Institute of Physics P193

      Pages: 1-8

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Anti-Stokes Luminescence of Magnetic Polarons in CdMnTe2003

    • Author(s)
      T.Okada
    • Journal Title

      Proc.26th Intern.Conf.Phys.Semicond., Institute of Physics H240

      Pages: 1-6

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Infrared transient absorption of excitons and biexcitons confined in CuCl quantum dots2003

    • Author(s)
      K.Miyajima
    • Journal Title

      phys.stat.sol.(c) vol.0 no.4

      Pages: 1275-1276

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Exciton-phonon interaction in epitaxial CdSe/ZnSe nanostructures2003

    • Author(s)
      A.M.Kapitonov
    • Journal Title

      phys.stat.sol.(b) vol.238

      Pages: 317-320

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Growth of CuCl nanostructures on CaF_2(111) substrates by MBE-their morphology and optical spectra-2002

    • Author(s)
      A.Kawamori
    • Journal Title

      J.Crystal Growth vol.237-239

      Pages: 1615-1619

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Book] CuCl quantum dots Encyclopedia of Nanoscience and Nanotechnology, vol.102004

    • Author(s)
      K.Edamatsu
    • Publisher
      American Scientific Publishers
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Publications] M.Minamiguchi: "Backward quasi-phase matched second haramonic generation and photonic band effects in semiconductor/dielectric multiplayer structure"Tech.Digest of Nonlinear Optics. 407-408 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] N.Yafune: "Epitaxial Growth and characterization of CuCl nanostructures on CaF2 (111) substrate"Proc.26th Intern.Conf.Phys.Semocond., Institute of Physics. P193,1-P193,8 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Okada: "Anti-Stokes Luminescence of Magnetic Polarons in CdMnTe"Proc.26th Intern.Conf.Phys.Semocond., Institute of Phsics. H240,1-H240,6 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Miyajima: "Infrared transient absorption of Excitons and biexcitons confined in CuCl quantum dots"phys.stat.sol.(c). No.4. 1275-1278 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] P.H.Duong: "Temperature dependence of photoluminescence from localized states of silicon nanocrystals in silicon implanted quartz"phys.stat.sol.(c). No.4. 1271-1274 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] A.M.Kapitonov: "Exciton-phonon interaction in epitaxial CdSe/ZnSe nanostructures"phys.stat.sol.(b). 238. 317-320 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Edamatsu: "CuCl quantum dots Encyclopedia of Nanoscience and Nanotechnology, vol.10"American Scientific Publishers (in press). 40

    • Related Report
      2003 Annual Research Report
  • [Publications] A.Kawamori: "Growth of CuCL nanostructures on CaF_2 (111) substrates by MBE --their morphology and optical spectra --"J. Crystal Growth. 237-239. 1615-1619 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Minamiguchi: "Backward quasi-phase matched second harmonic generation and photonic band effects in semiconductor/dielectric multiplayer structure"Tech. Digest of Nonlinear Optics. (in press). 407-408 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] N.Yafune: "Epitaxial Growth and characterization of CuCl nanostructures on CaF_2(111) substrate"Proc. 26th Intern. Conf. Phys. Semocond., Institute of Physics. (in press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Miyajima: "Infrared transient absorption of Excitons and biexcitons confined in CuCl quantum dots"phys. stat. sol. (b). (in press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] P.H.Duong: "Temperature dependence of photoluminescence from localized states of silicon nanocrystals in silicon implanted quartz"phys. stat. sol. (b). (in press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.M.Kapitonov: "Exciton-phonon interaction in epitaxial CdSe/ZnSe nanostructures"phys. stat. sol. (b). (in press). (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2020-05-15  

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