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Carrier dynamics of semiconductor surfaces by means of femtosecond two-photon photoelectron spectroscopy

Research Project

Project/Area Number 12440087
Research Category

Grant-in-Aid for Scientific Research (B)

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 UNIV.

Principal Investigator

TANIMURA Katsumi  OSAKA UNIV. ISIR Prof., 産業科学研究所, 教授 (00135328)

Co-Investigator(Kenkyū-buntansha) ISHIKAWA Kenichi  ISIR Research Assoc., 産業科学研究所, 助手 (90288556)
MUNAKATA Toshiaki  RIKEN Senior Research Scientist, ダイナミクスユニット, 先任研究員 (20150873)
TANAKA Shinichiro  ISIR Assoc. Prof., 産業科学研究所, 助教授 (00227141)
西嶋 茂宏  大阪大学, 産業科学研究所, 助教授 (00156069)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥15,900,000 (Direct Cost: ¥15,900,000)
Fiscal Year 2002: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2001: ¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 2000: ¥9,000,000 (Direct Cost: ¥9,000,000)
Keywordstwo-photon photoelectron spectroscopy / semiconductor surfaces / photoinduced structural changes / desorption / 半導体再構成表面 / 2光子光電子分光 / STM / フェムト秒レーザー
Research Abstract

The purpose of this project is to elucidate the dynamics of excited states on semiconductor surfaces, a typical quasi-two dimensional system, by means of femtosecond two-photon photoelectron (2ppe) spectroscopy. The knowledge of the dynamics provides fundamental basis on which mechanisms of photoinduced structural changes on the surfaces can be understood from microscopic point of view. Main results obtained are summarized below.
1) The femtosecond-time resolved studies of 2ppe on Si(001)-(2x1) has resolved fundamental processes of surface-state dynamics including the transitions from bulk-to-surface states and the depopulation of the surface states. One of the most important findings is that the transition rate from bulk-to-surface states is carrier-density dependent; the rate is proportional to squire of the density. Thus, an important role of electron-electron scattering in the transition process has been revealed for the first time.
2) The photoinduced structural changes on Si(111)-(7x7), Si(001)-(2x1), Si(111)-(2x1), and InP(110)-(1x1)surfaces have been studied by means of scanning tunneling microscopy (STM) and by highly sensitive laserionization spectroscopy of desorbed neutrals upon surface photoexcitation. On all of these surfaces, intrinsic sites of the surfaces are subject of bond rapture upon excitation, showing the intrinsic structural instability under valence excitation. The mechanism of the instability has been identified to be the two-hole localization; a dense population of valence holes forms a two-hole localized sate on intrinsic sites on surfaces to induce bond breaking and desorption. This finding enables us to generate new photoinduced phases of surface, typically shown for (1x1) structure of Si(001)-(2x1) generated by selective layer removal under laser excitation.
These results have provided us crucial knowledge for establishing thorough understanding of the photoinduced processes on semiconductor surfaces.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (34 results)

All Other

All Publications (34 results)

  • [Publications] K.Shudo, T.Munakata: "Resonant photoemission of Si(OO1)measured with two-photon photoemission spectroscopy"Phys.Rev. B. 63. 125324-1-125324-5 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Tanimura: "Femtosecond time-resolved spectroscopy of formation of self-trapped excitons in CaF_2"Phys.Rev. B. 63. 184303-1-184303-4 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Kanasaki, N.MIkasa, K.Tanimura: "Laser-induced electronic desorption from InP surfaces studied by femtosecond nonresonant ionization spectroscopy"Phys.Rev. B. 64. 035414-1-035414-10 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Tanimura, J.Kanasaki, K.Ishikawa: "Laser-induced electronic instability on semiconductor surfaces of Si (111)-(7x7) and InP (110)-(1x1)"Proceedings of the 25^<th> International Conference on Physics of Semiconductors (Springer proceedings in physics). 87. 325-326 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Kanasaki, K.Tanimura: "Laser-induced electronic desorption of Si atoms from Si(111)-(7x7)"Phys.Rev. B. 66. 125320-1-125320-5 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Kanasaki, K.Tanimura: "Laser-induced electronic desorption and structural changes on Si(001)-(2x1)"Proceedings of SPIE. 4636. 48-58 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Kanasaki, M.Nakamura, K.Ishikawa, K.Tanimura: "Primary Processes of laser-induced selective dimer-layer removal on Si(001)-(2x 1)"Phys.Rev.Lett.. 89. 257601-1-257601-4 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Shudo, S.Takeda, T.Munakata: "Resonant surface-state transitions of Si(111)-7x7 measured with two-photon photoemission spectroscopy"Phys.Rev. B. 65. 075302-1-075302-6 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Kanasaki, N.MIkasa, K.Tanimura: "Laser-induced electronic bond breaking and desorption on Si(001)-(2x1)"Surf.Sci.. 528. 127-131 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Kanasaki, K.Tanimura: "Electronic bond rupture of Si atoms on Si(111)-(2x1) induced by 1.16-eV photon excitation"Surf.Sci.. 528. 115-120 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S.Tanaka, K.Tanimura: "Time-resolved two-photon photoelectron spectroscopy of Si(OO1)-(2x1) surface"Surf.Sci.Lett.. 529. L251-L255 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] E.Inami, K.Ishikawa, K.Tanimura: "Bond rupture of threefold-coordinated Si atoms at intrinsic sites on Si(111)-(2x1) induced by 1.16-eV photon excitation"Surf.Sci.Lett.. 540. L587-L592 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K. Shudo and T. Munakata: "Resonant photoemission of Si(001)measured with two-photon photoemission spectroscopy"Phys. Rev. B. 63. 125324-1-5 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K. Tanimura: "Femtosecond time-resolved spectroscopy of formation of self-trapped excitons in CaF_2"Phys. Rev. B. 63. 184303-1-4 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Kanasaki, N. MIkasa, and K. Tanimura: "Laser-induced electronic desorption from InP surfaces studied by femtosecond nonresonant ionization spectroscopy"Phys. Rev. B. 64. 035414-1-10 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K Tanimura, J. Kanasaki, and K. Ishikawa: "Laser-induced electronic instability on semiconductor surfaces of Si (111)-(7x7) and InP (110)-(1x1)"Proceedings of the 25^<th> International Conference on Physics of Semiconductors (Springer proceedings in physics). 87. 325-326 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Kanasaki and K. Tanimura: "Laser-induced electronic desorption of Si atoms from Si(111)-(7x7)"Phys. Rev. B. 66. 125320-1-5 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Kanasaki and K. Tanimura: "Laser-induced electronic desorption and structural changes on Si(001)-(2x1)"Proceedings of SPIE. 4636. 48-58 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Kanasaki, M. Nakamura, K. Ishikawa and K. Tanimura: "Primary Processes of laser-induced selective diner-layer removal on Si(001)-(2x1)"Phys. Rev. Lett. 89. 257601-1-4 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K. Shudo, S. Takeda, and T. Munakata: "Resonant surface-state transitions of Si(111)-7x7 measured with two-photon photoemission spectroscopy"Phys. Rev. B. 65. 075302-1-6 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Kanasaki, N. MIkasa, and K. Tanimura: "Laser-induced electronic bond breaking and desorption on Si(001)-(2x1)"Surf Sci. 528. 127-131 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Kanasaki, and K. Tanimura: "Electronic bond rupture of Si atoms on Si(111)-(2x1) induced by 1.16-eV photon excitation"Surf. Sci.. 528. 115-120 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S. Tanaka and K. Tanimura: "Time-resolved two-photon photoelectron spectroscopy of Si(001)-(2x1) surface"Surf. Sci. Lett.. 529. L251-L255 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] E. Inami, K. Ishikawa, and K. Tanimura: "Bond rupture of threefold-coordinated Si atoms at intrinsic sites on Si(111)-(2x1) induced by 1.16-eV photon excitation"Surf. Sci. Lett.. 540. L587-L592 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J.Kanasaki, K.Tanimura: "Laser-induced electronic desorption of Si atoms from Si(111)-(7x7)"Phys.Rev.B. 66. 125320-1-125320-5 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] J.Kanasaki, M.Nakamura, K.Ishikawa, K.Tanimura: "Primary processes of laser-induced selective dimer-layer removal on Si(001)-(2x1)"Phys.Rev.Lett.. 89. 257601-1-257601-4 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] J.Kanasaki, K.Tanimura: "Laser-induced electronic bond breaking and desorption on Si(001)-(2x1)"Surf.Sci.. 528. 127-131 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] E.Inami, K.Ishikawa, J.Kanasaki, K.Tanimura: "Electronic bond rupture of Si atoms on Si(111)-(2x1) induced by 1.15-eV photon excitation"Surf.Sci.. 528. 115-120 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.Tanaka, K.Tanimura: "Time-resolved two-photon photoelectron spectroscopy of Si(001)-(2x1) surface"Surf.Sci.Lett.. (in print).

    • Related Report
      2002 Annual Research Report
  • [Publications] J.Kanasaki, N.Mikasa, K.Tanimura: "Laser-induced electronic desorption from InP surfaces studied by femtosecond nonresonant ionization spectroscopy"Phys.Rev.B. 64. 0354144-1-035414-10 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Tanimura, J.Kanasaki, K.Ishikawa: "Laser-Induced Electronic Instability on Semiconductor Surfaces of Si (111)-(7x7) and InP (110)-(1x1)"Proceedings of the 25^<th> International Conference on Physics of Semiconductors (Springer proceedings in physics). 87. 325-326 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Shudo, S.Takeda, T.Munakata: "Resonant surface-state transitions of Si(111)-7x7 measured with two-photon photoemission spectroscopy"Phys.Rev.B. 65(in print).

    • Related Report
      2001 Annual Research Report
  • [Publications] J.Kanasaki, K.Tanimura: "Laser-induced electronic desorption and structural changes on Si(001)-(2x1)"Proceedings of international conference on "nanoscience using laser-solid interactions"SPIE proceedings. (in print).

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Shudo and T.Munakata: "Resonant Photoexcitation of Si(100) measured with two-photon photoemission spectroscopy"Physical Review B. (in print). (2001)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2020-05-15  

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