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Control of nano-scale quantum wire structures and optocal properties of one-dimensional excitons

Research Project

Project/Area Number 07455131
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Electronic materials/Electric materials
Research InstitutionThe University of Tokyo

Principal Investigator

SAKAKI Hiroyuki  Univ. of Tokyo Research Center for Advanced Science and Technology, Professor, 先端科学技術研究センター, 教授 (90013226)

Co-Investigator(Kenkyū-buntansha) AKIYAMA Hidefumi  Univ. of Tokyo, Institute for Solid State Physics, Assiciate-Professor, 物性研究所, 助教授 (40251491)
NODA Takeshi  Univ. of Tokyo Research Center for Advanced Science and Technology, Research Ass, 先端科学技術研究センター, 助手 (90251462)
TAKAHASHI Takuji  Univ. of Tokyo Research Center for Advanced Science and Technology, Associate-Pr, 先端科学技術研究センター, 助教授 (20222086)
永宗 靖  工業技術院, 電子技術総合研究所, 主任研究官 (20218027)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥6,900,000 (Direct Cost: ¥6,900,000)
Fiscal Year 1996: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1995: ¥4,700,000 (Direct Cost: ¥4,700,000)
Keywordsridge quantum wire / atomic force microscope / cleaved overgrowth / T-shaped GaAs quantum wire / spatially resolved micro-photo luminescence / one-dimensional exciton / oscillator strength / diamugnetic shift / 量子細線 / 一次元状態 / 空間分解フォトルミネセンス / 横方向閉じ込め / フォトルミネセンス励起スペクトル / T型量子細線 / リッジ構造 / へき開再成長法 / 束縛エネルギー / クーロン相互作用
Research Abstract

(1) Invesrigation of growth mechanism and shape control of the ridge quantum wire
We connected an ulfra high vacuum atomic force microscope to the molecular beam epitaxy system and realized an in-situ observation of the formation process of ridge quantum wire. Ridge quantum wire takes form throuhg the following process. First, (001)-(111) B facet structures appear on the mesa shaped substrate. On the border of (001)-(111) B facet, (101) surface and (112) surface also appear. As these surfaces grow, (001) surface disappears. Since Ga atoms bury vicinal facets, very smooth ridge strudture is formed. We made a successful growth of 10nm scale ridge quantum wire under the substrate temperature less than 520゚C.
(2) Optical properties of one-dimensional exciton in the nm-scale quantum wire
We fabricated the T-shaped GaAs quantum wire by the cleaved-edge over-growth and measured spatially resolved micro photo luminescence in the magnetic fields. It was clarified that in the T-shaped quantum wire with 5nm-thick AlAs barriers the lateral confinementenergy was 38 meV and that the binding energy of one-dimentional exciton increased up to 27meV.We investigated the anisotropy of valence band from the optical anisotropy which was in good agreement with the theory. From the diamagnetic shifts, we successfully observed the dependence of the spatial extent of wave function on the width of quantum wire. It was also found that oscillator strength increased as lateral confinement was effective from the photo luminescence excitation experiment.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (39 results)

All Other

All Publications (39 results)

  • [Publications] T.Someya: "Tightly confined one-dimensional states in T-shaped GaAs edge quantum wires with AlAs barries" Appl.Phys.Lett.66(26). 3672-3674 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Someya: "Laterally squeezed excitonic wave function in quantum wires" Physical Review Letters. 74(18). 3664-3667 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Akiyama: "Thermalization effects of low dimensional excitons in quantum wires and quantum wells" Materials Science & Engineering B. 35. 284-287 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Someya: "Effect of lateral confinement of excitonic wavefunctions in T-shaped edge quantum wires" Solid State Electronics. 40. 315-318 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Akiyama: "Optical anisotropy in 5-nm-scale T-shaped GaAs quantum wires fabricated by cleaved edge overgrowth method" Physical Review B. 53. R4229-R4232 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Someya: "Spatially resolved photoluminescence study on T-shaped quantum wires fabricated by cleaved edge overgrowth method" J.Appl.Phys.79(5). 2522-2528 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Akiyama: "Dimensional crossover and confinement-induced optical anisotropy in GaAs T-shaped quantum wires" Physical Review B. 53. 10520-10523 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Akiyama: "Concentrated oscillator strength of one-dimensional excitons in quantum wires observed with photoluminescence excitation spectroscopy" Physical Review B. 53. R16160-R16163 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Someya: "Enhanced binding energy of one-dimensional excitons in quantum wires" Physical Review Letters. 76. 2965-2968 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Akiyama: "Microscopic photoluminescence spectroscopy of 5-nm-scale T-shaped quantum wires fabricated by cleaved edge overgrowth method" Technical Digest of Interntional Quantum Electronics Conference. 9. (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Someya: "Molecular beam epitaxial growth of In0.15Ga0.85As quantum wells on GaAs(110)surfaces" Japanese Journal of Applied Physics. 35. 2544-2547 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 秋山英文: "自由電子レーザ・炭酸ガスレーザを用いた半導体量子細線・井戸構造の赤外分光" 固体物理. 31(4). 255-262 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.KOSHIBA: "Ultrahigh vacuum atomic force microscope study of 10-30 nm scale GaAs ridge formation by molecular beam epitaxy" Appl.Phys.Lett. 70(7). 883-885 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.KOSHIBA: "UHV-AFM study of MBE-grown 10nm scale ridge quantum wires" Journal of CRYSTAL GROWTH. (to be published). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Someya, H.Akiyama, and H.Sakaki: "Tighly-confined one-dimensional state in T-shaped edge quantum wires" Appl. Phys. Lett.66. 3672 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Someya, H.Akiyama, and H.Sakaki: "Laterally squeezed excitonic wave function in quantum wires" Phys. Rev. Lett.74. 3664 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Akiyama, and H.Sakaki (invited): "Thermalization Effects of Low Dimensional Excitons in Quantum Wires and Quantum wells" Material Sciences and Engineering. B35. 284 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Someya, H.Akiyama, M.Yamauchi, H.Sugawara, and H.Sakaki: "Effect of lateral confinement on excitonic wavefunction in edge quantum wires" Solid State Electronics. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Akiyama, T.Someya, and H.Sakaki: "Optical anisotropy in 5nm-scale T-shaped Quantum Wires Fabricated by Cleaved Edge Overgrowth Method" Phys. Rev. B.53. R4229 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Someya, H.Akiyama, and H.Sakaki: "Spatially resolved photoluminescence study on T-shaped quantum wires fabricated by cleaved edge overgrowth method" J.Appl. Phys.(1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Akiyama, T.Someya, and H.Sakaki: "Dimensional Crossover and Confinement-induced Optical Anisotropy in GaAs T-shaped Quantum Wires" Phys. Rev. B.53. R10520 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Akiyama, T.Someya, and H.Sakaki: "Concentrated oscillator strength of one-dimensional excitons in quantum wires observed with photoluminescence excitation spectroscopy" Physical Review. B53. R16160-R16163 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Someya, H.Akiyama, and H.Sakaki: "Enhanced bindings energy of one-dimensional excitons in quantum wires" Physical Review Letters. 76. 2965-2968 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Akiyama, T.Someya, and H.Sakaki: "Microscopic photoluminescence spectroscopy of 5-nm-scale T-shaped quantum wires fabricated by cleaved edge overgrowth method" Technical Digest of International Quantum Electronics Conference, Technical Digest Series 9. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Someya, H.Akiyama, and H.Sakaki: "Molecular beam epitaxial growth of In0.15Ga0.85As quantum wells on GaAs (110) surfaces" Jpn. J.of Appl. Phys.35. 2544-2547 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.Koshiba, I.Tanaka, Y.Nakayama, H.Noge, and H.Sakaki: "Ultrahigh vacuum atomic force microscope study of 10-30 nm scale GaAs ridge formation by molecular beam epitaxy" Appl. Phys. Lett.70(7). 883-885 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.Koshiba, I.Tanaka, Y.Nakayama, I.Kamiya, T.Someya, T.Noge, and H.Sakaki: "UHV-AFM study of MBE-grown 10 nm scale ridge quantum wires" Journal of Cryst. Growth. (to be published). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Someya,H.Akiyama,and H.Sakaki: "Enhanced binding energy of one-dimensional excitons in quantum wires" Physical Review Letters. 76. 2965-2968 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Akiyama,T.Someya,and H.Sakaki: "Optical anisotropy in 5-nm-scale T-shaped GaAs quantum wires fabricated by cleaved edge overgrowth method" Physical Review B. 53. R4229-R4232 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Akiyama,T.Someya,and H.Sakaki: "Dimensional crossover and confinement-induced optical anisotropy in GaAs T-Shaped quantum wires" Physical Review B. 53. 10520-10523 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Someya,H.Akiyama,and H.Sakaki: "Molecular beam epitaxial growth of In0.15Ga0.85As quantum wells on GaAs(110)surfaces" Japanese Journal of Applied Physics. 35. 2544-2547 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Akiyama,T.Someya,and H.Sakaki: "Microscopic photoluminescence spectroscopy of 5-nm-scale T-shaped quantum wires fabricated by cleaved edge overgrowth method" Technical Digest Series. 9. (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Akiyama,T.Someya,and H.Sakaki: "Concentrated oscillator strength of one-dimensional excitons in quantum wires observed with photoluminescence excitation spectroscopy" Physical Review B. 53. R16160-R16163 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] S.Koshiba et al.: "Control of Ridge Shape for the Formation of nm-Scale GaAs Ridge Quantum Wires by MBE" Journal of Crystal Growth. 150. 322-326 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] T.Inoshita and H.Sakaki: "Electronic Structure of Ridge Quantum Wire based on an Analytic Confinement Model" Journal of Applied Physics. 79. 269-272 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] T.Someya,H.Akiyama,and H.Sakai: "Laterally squeezed excitonic wave function in quantum wires" Physical Review Letters. 74. 3664-3667 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] T.Someya,H.Akiyama,and H.Sakaki: "Tightly-confined one-dimensional state in T-shaped edge quantum wires" Applied Physics Letters. 66. 3672-3673 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] T.Someya,H.Akiyama,and H.Sakaki: "Spatially resolved photoluminescence study on T-shaped quantum wires fabricated by cleaved edge overgrowth method21GC05:Journal of Applied Physics" (3/15号発表予定). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] H.Akiyama,T.Someya,and H.Sakaki: "Optical anisotropy in 5nm-scale T-shaped Quantum Wires Fabricated by Cleaved Edge Overgrowth Method" Physical Review B. (発表予定). (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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