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Exciton Rabi oscillation in GaAs quantum dots

Research Project

Project/Area Number 15340093
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics I
Research InstitutionTokyo Institute of Technology

Principal Investigator

MINAMI Fujio  Tokyo Institute of Technology, Department of Physics, Professor, 大学院・理工学研究科, 教授 (30200083)

Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥16,700,000 (Direct Cost: ¥16,700,000)
Fiscal Year 2004: ¥5,400,000 (Direct Cost: ¥5,400,000)
Fiscal Year 2003: ¥11,300,000 (Direct Cost: ¥11,300,000)
Keywordsphoton echo / Rabi oscillation / quantum dot / exciton / GaAs / dephasing / 非マルコフ過程
Research Abstract

We performed the photon echo experiment on GaAs quantum dots at 5K. The excitation light source was a fs Ti-Sapphire laser. The excitation photon energy was tuned to cover the lowest exciton in GaAs quantum dots. A dominant signal is observed at the zero time delay, which is due to photon echoes from the GaAs substrate and is unrelated to the quantum dots. For longer delays, we can observe a slowly decaying signal with a time constant of 〜1 ns. This signal is due to the dephasing of the exciton coherence in the quantum dots. Therefore, it can be concluded that the dephasing time of the exciton is extremely long (〜1 ns) in the quantum dots as compared to that in usual quantum wells (〜1ps).
When changing the exciting pulse power, the signal intensity of the photon echo varys greatly. The echo intensity is found to oscilate as the excitation power increases. It can be understood that this oscillation is analogous to the Rabi oscillation, which is observed in resonantly driven two level systems. It is therefore considered that we observed the Rabi oscillation of the exciton in the quantum dots. It is noted that the Rabi oscillation can be observed under relatively low excitation power. Because the Rabi oscillation is an essential phenomenon to rotate q-bit, this result shows that the semiconductor quantum dots are promising as the logical circuit material of the quantum computing.

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (24 results)

All 2005 2004 Other

All Journal Article (18 results) Publications (6 results)

  • [Journal Article] Theory of multiwave mixing and decoherence control in qubit array system2005

    • Author(s)
      M.Sasaki, A.Hasegawa, J.Ishi-Hayase, F.Minami
    • Journal Title

      Phys.Rev.B 71

      Pages: 165314-165314

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Theory of multiwave mixing and decoherence control in qubit array system2005

    • Author(s)
      M.Sasaki, A.Hasegawa, J.Ishi-Hayase, Y.Mitsumori, F.Minami
    • Journal Title

      Phys.Rev.B 71

      Pages: 165314-165314

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Dynamics of photoinduced magnetization rotation in ferromagnetic semiconductor p-(Ga,Mn)As2005

    • Author(s)
      Y.Mitsumori, A.Oiwa, T.Slupinsi, H.Maruki, Y.Kashimua, F.Minami, H.Munekata
    • Journal Title

      Phys.Rev.B 69

      Pages: 33203-33203

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Theory of multiwave mixing and decoherence control in qubit array system2005

    • Author(s)
      M.Sasaki, A.Hasegawa, Y.Mitsumori, F.Minami
    • Journal Title

      Physical Review B 72(in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Dynamics of photoinduced magnetization rotation in ferromagnetic semiconductor p-(Ga,Mn)As2004

    • Author(s)
      Y.Mitsumori, A.Oiwa, F.Minami, H.Munekata
    • Journal Title

      Phys.Rev.B 69

      Pages: 33203-33203

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Thermal broadening of the exciton line in III-V semiconductor quantum dots2004

    • Author(s)
      K.Ikeda, F.Minami, N.Koguchi
    • Journal Title

      Phys.Stat.Sol C 1

      Pages: 573-576

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Multi-wave-mixing of two-dimensional excitons in semiconductors2004

    • Author(s)
      A.Hasegawa, T.Kishimoto, Y.Mitsumori, F.Minami
    • Journal Title

      J.Lumin. 108

      Pages: 215-219

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Acoustical phonon broadening of the exciton line in semiconductor single quantum dots2004

    • Author(s)
      K.Ikeda, F.Minami, S.Kuroda, K.Takita
    • Journal Title

      J.Lumin. 108

      Pages: 375-378

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Multi-wave-mixing of two-dimensional excitons in semiconductors2004

    • Author(s)
      A.Hasegawa, T.Kishimoto, Y.Mitsumori, M.Sasaki, F.Minami
    • Journal Title

      J.Lumin. 108

      Pages: 211-214

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Acoustical phonon broadening of the exciton line in semiconductor single quantum dots2004

    • Author(s)
      K.Ikeda, F.Minami, S.Kuroda, K.Takita, N.Koguchi
    • Journal Title

      J.Lumin. 108

      Pages: 375-378

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Confined electronic structure in GaAs quantum dots2004

    • Author(s)
      M.Yamagiwa, N.Sumita, F.Minami, N.Koguchi
    • Journal Title

      J.Lumin. 108

      Pages: 379-383

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Thermal broadening of the exciton line in III-V semiconductor quantum dots2004

    • Author(s)
      K.Ikeda, F.Minami, N.Koguchi
    • Journal Title

      Phys.Stat.Sol. C1

      Pages: 573-576

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Multi-wave-mixing of two-dimensional excitons in semiconductors2004

    • Author(s)
      A.Hasegawa, T.Kishimoto, Y.Mitsumori, M.Sasaki, F.Minami
    • Journal Title

      J.Luminescence 108

      Pages: 211-214

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Confined electronic structure in GaAs quantum dots2004

    • Author(s)
      M.Yamagiwa, N.Sumita, F.Minami, N.Koguchi
    • Journal Title

      J.Luminescence 108

      Pages: 379-383

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Phonon bottleneck effects in InAs/GaInP quantum dots2004

    • Author(s)
      K.Ikeda, H.Sekiguchi, F.Minami, J.Yoshino, S.Nagao
    • Journal Title

      J.Luminescence 108

      Pages: 273-276

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Acoustical phonon broadening of the exciton line in semiconductor single quantum dots2004

    • Author(s)
      K.Ikeda, F.Minami, S.Kuroda, K.Takita, N.Koguchi
    • Journal Title

      J.Luminescence 108

      Pages: 375-378

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Local field effect on Rabi oscillations of excitons localized to quantum islands in a single quantum well

    • Author(s)
      Y.Mitsumori, A.Hasegawa, M.Sasaki, F.Minami
    • Journal Title

      Phys.Rev.B (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Local field effect on Rabi oscillations of excitons localized to quantum islands in a single quantum well

    • Author(s)
      Y.Mitsumori, A.Hasegawa, M.Sasaki, H.Maruki, F.Minami
    • Journal Title

      Phys.Rev.B (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] Y.Mitsumori, A.Oiwa, F.Minami, H.Munekata: "Dynamics of photoinduced magnetization rotation in ferromagnetic semiconductor p-(Ga, Mn)As"Physical Review B. 69. 033203 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] S.Sanguinetti, M.Gurioli, T.Kuroda, K.Watanabe, F.Minami: "Carrier relaxation in quantum dots without wetting layer"Physica E. 17. 91-93 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Komori, T.Ishikawa, J.Yoshino, F.Minami, S.Koshihara: "Carrier-density dependence of magnetic and magneto-optical properties of (Ga, Mn)As"Physical Review B. 67. 115203 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] A.Hasegawa, T.Kishimoto, Y.Mitsumori, M.Sasaki, F.Minami: "Temporal Behavior of Quantum Interfered Polarization between Two Excitons"Proc.26th Int.Conf.Semicond.Phys.. 44 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Mitsumori, H.Maruki, A.Hasegawa, F.Minami, M.Sasaki: "Photon echoes from GaAs quantum dots"Proc.26th Int.Conf.Semicond.Phys.. 218 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Kitano, F.Minami, T.Sawada, S.Yanaguchi, K.Ohtake: "Propagation of femtosecond light pulses in three-dimensional photonic crystal"Proc.26th Int.Conf.Semicond.Phys.. Q3.1 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2020-05-15  

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