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Tunneling Phenomena in GaAs/AlGaAs Double Quantum Well Structures

Research Project

Project/Area Number 03650257
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 電子材料工学
Research InstitutionNAGOYA UNIVERSITY

Principal Investigator

SAWAKI Nobuhiko  Nagoya Univ. School of Engg. Prof., 工学部, 教授 (70023330)

Co-Investigator(Kenkyū-buntansha) GOTO Hideo  Nagoya Univ. School of Engg. Res. Assist., 工学部, 助手 (00195942)
Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1992: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1991: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsDOUBLE QUANTUM WELL / HOT ELECTRON / TUNNELING / QUANTUM WIRE / PHONON SCATTERING / FEMTOSECOND SPECTROSCOPY / TWO DIMENSIONAL ELECTRON GAS / 量子井戸 / 二次元電子 / 実空間遷移 / フォトルミネッセンス / 薄膜多層構造
Research Abstract

1.The mechanism and the speed of tunneling in double quantum well strucutres(DQW), which have two GaAs quantum wells with different widths and separated by a thin AlGaAs potential barrier, have been investigated. The samples were made with MBE and MOVPE. The electrical as well as the opotical properties of DQW have been studied.
2.Applying an electric field parallel to the heterointerface, electrons in the wide well are accelerated to become hot. The current-voltage characteristics exhibit a kink due to the real space transfer of electrons into the narrow well. It is found that the tunneling is due to the LO phonon-assisted indirect process.
3.By an electric field perpendicular to the heterointerface, the difference energy between the two quantized levels in DQW was changed, and the tunneling time was measured by femtosecond spectroscopy. It was found that the tunneling time is a strong function of the electric field, and that the tunneling is due to LO phonon assisted at the off resonance condition.
4.The effect of the fabrication process on the tunneling is investigated by making quasi-one dimensional structures. It was found that the tunneling time as well as the energy relaxation time of electrons are significantly reduced. The scattering due to the surface roughness does give the predominant mechanism in the tunneling phenomena in small structures.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] E.Okuno: "Hot Electron and Real Space Transfer in Double Quantum Well Structures" Japan.J.Appl.Physics. 30. 1373-1377 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] E.Okuno: "Real Space Transfer and Modulation of Electron Mobility in GaAs/AlGaAs Double Quantum Well Structures" Surface Science. 267. 570-573 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] K.Kuvoyanagi: "Phonon-assisted Tunneling in a Double Quantum Well Structure" Semicond.Science & Technology. 7. B424-426 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] A.Ishida: "Picosecond Spectroscopy of Tunneling and Energy Relaxation in Double Quantum Well Wires" Semicond.Science & Technology. 7. B427-429 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] E.Okuno: "Measurement of Minority-Carrier Drift Velocity in Quantum Well Structures by Photoluminescence Intensity Correlation Method" Japan.J.Appl.Physics. 31. L148-150 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] E.Okuno, N.Sawaki, I.Akasaki, H.Kano, and M.Hashimoto: "Hot Electron and Real Space Transfer in Double Quantum Well Structures" Jpn. J. Appl. Phys.vol.30, No.7. 1373-1377 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] E.Okuno, J.Kondo, H.Sawaki, and I.Akasaki: "Real Space Transfer and Modulation of Electron Mobility in GaAs/AlGaAs Double Quantum Well Structures" Surface Science. vol.267,No.1/3. 570-573 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] K.Kuroyanagi, N.Sawaki, T.Takatsuka, I.Akasaki, T.Kawakami, and H.Goto: "Phonon-assisted Tunneling in a Double Quantum Well Structure" Semicond. Sci. & Tech.vol.7. B424-426 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] A.Ishida, E.Okuno, H.Goto, N.Sawaki, I.Akasaki, T.Suzuki, H.Ito and K.Hara: "Picosecond Spectroscopy of Tunneling and Energy Relaxation in Double Quantum Well Wires" Semicond. Sci. & Tech.vol.7. B427-429 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] E.Okuno, T.Hori, N.Sawaki, I.Akasaki, and R.A.Hoepfel: "Measurement of Minority-Carrier Drift Velocity in Quantum Well Structures by Photoluminescence Intensity Correlation Method" Jpn. J. Appl. Phys.vol.31, No.2B. L148-150 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] E.Okuno: "Real Space Transfer and Modulation of Electron Mobility in GaAs/AlGaAs Double Quantum Well Structures" Surface Science. 267. 570-573 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] K.Kuroyanagi: "Phonon-assisted Tunneling in a Double Quantum Well Structure" Semicond.Science & Technology. 7. B424-426 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] A.Ishida: "Picosecond Spectroscopy of Tunneling and Energy Relaxation in Double Quantum Well Wires" Semicond.Science & Technology. 7. B427-429 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] E.Okuno: "Measurement of Minority-Carrier Drift Velocity in Quantum Well Structures by Photoluminescence Intensity Correlation Method" Japan.J.Appl.Phys. 31. L148-150 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] E.OKUNO: "Hot Electron and Real Space Transfer in Double Quantum Well Structures" Jpn.J.Appl.Phys.30. 1373-1377 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] E.OKUNO: "Real Space Transfer and Modulation of Electron Mobility in GaAs/AlGaAs Double Quantum Well Structures" Work Book of 5th Intern.Conf.Mod.Semiconductor Structure. 273-276 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] K.KUROYANAGI: "Phononーassisted Tunneling in a Double Quantum Well Structure" Abstract of 7th Intern.Conf.Hot Carriers in Semiconductors. 86 (1991)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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