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Ultrahigh time and space resolved spectroscopy and its application to the study of photo-iduced phase transition

Research Project

Project/Area Number 16K13822
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Condensed matter physics I
Research InstitutionOsaka City University (2019)
Osaka University (2016-2018)

Principal Investigator

Kanasaki Jun'ichi  大阪市立大学, 大学院工学研究科, 教授 (80204535)

Co-Investigator(Kenkyū-buntansha) 木曽田 賢治  和歌山大学, 教育学部, 教授 (90243188)
Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords分光 / 光誘起相転移 / 新構造相創成 / ナノ構造 / グラファイト / グラフェン / 光誘起構造変化 / ラマン散乱分光 / 光誘起構造制御 / 時空間分解測定 / トンネル顕微鏡 / 光誘起構造相転移 / ゲルマネン / 光物性 / 局所分光 / 表面・界面 / 相転移 / ポンプ・プローブ分光 / 探針増強ラマン散乱 / 表面界面物性 / ナノ物性 / ナノ計測
Outline of Final Research Achievements

By using scanning tunneling microscopy, we have reviealed the primary steps included in the excitation-induced phase transformation, such as nucleation and proliferation of sp3-like interlayer bonds. The growth mode of photo-induced structures strongly depends on the photon energy, and these results are interpreted by different dynamical pathways for the nucleation and proliferation of interlayer-bonded phase. The findings of our investigation can provide a key to the optical control of sp2-to-sp3 conversion and the organization with the nano-scaled products in graphene-related materials.
Also, we studied the structural stability of graphene on SiC under pulsed laser iraadiations. We analyzed the evolution of 2D Raman peak of graphene layers, and revealed that optical excitation removes graphene layer selectively from multiple graphene-layer region, forming single atomic-layer graphene on SiC which is stable against the excitation.

Academic Significance and Societal Importance of the Research Achievements

グラファイトにおける光誘起構造相転移の過程で生成される核構造や新規構造相の成長過程の原子論的解明に成功すると共に、核形成と新構造相の成長過程が示す異なる波長依存性を明確にした。物性物理学的に重要な知見を得ると共に、光による構造制御に向けた可能性を拓いた。
また、光励起に対するグラフェン構造の安定性が原子層数に強く依存することを発見し、光励起による単層グラフェンの精製技術の可能性を示した。グラフェンの特異な電子的特性や機械特性はグラフェンの原子層数に強く依存しており、本研究の成果は応用物理学及び材料科学分野において大きな波及効果が期待でき、社会的意義は大きいものと評価できる。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (20 results)

All 2019 2018 2017 2016

All Journal Article (5 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (15 results) (of which Int'l Joint Research: 7 results,  Invited: 3 results)

  • [Journal Article] Ultrafast dynamics in photoexcited valence-band states of Si studied by time- and angle-resolved photoemission spectroscopy of bulk direct transitions2018

    • Author(s)
      Kanasaki Jun'ichi、Tanimura Hiroshi、Tanimura Katsumi、Ries Philip、Heckel Wolfgang、Biedermann Kerstin、Fauster Thomas
    • Journal Title

      Physical Review B

      Volume: 97 Issue: 3

    • DOI

      10.1103/physrevb.97.035201

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Energy relaxation mechanism of hot-electron ensembles in GaAs: Theoretical and experimental study of its temperature dependence2018

    • Author(s)
      Sjakste Jelena、Vast Nathalie、Barbarino Giuliana、Calandra Matteo、Mauri Francesco、Kanasaki Junichi、Tanimura Hiroshi、Tanimura Katsumi
    • Journal Title

      Physical Review B

      Volume: 97 Issue: 6

    • DOI

      10.1103/physrevb.97.064302

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Electronic structure of the surface unoccupied band of Ge(001)-c(4×2): Direct imaging of surface electron relaxation pathways2017

    • Author(s)
      Kanasaki J.、Yamamoto I.、Azuma J.、Fukatsu S.
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 11 Pages: 115301-115301

    • DOI

      10.1103/physrevb.96.115301

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Formation of hot-electron ensembles quasiequilibrated in momemtum space by ultrafast momentum scattering of highly excited hot electrons photoinjected into Γ-valley of GaAs2016

    • Author(s)
      H. Tanimura, J. Kanasaki, K. Tanimura, J. Sjakste, N. Vast, M. Calandra, and F. Mauri
    • Journal Title

      Physical Review B

      Volume: 93

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Comparison of electronic-excitation-induced structural modification of Carbon-based nanomaterials with that of semiconductor surfaces2016

    • Author(s)
      N. Itoh, C. Itoh, and J. Kanasaki
    • Journal Title

      NANO

      Volume: 11 Issue: 06 Pages: 1630001-1630001

    • DOI

      10.1142/s1793292016300012

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Optical control of structural transformation to form nano-scaled carbon phase including sp3-like interlayer bonds in graphite2019

    • Author(s)
      E. Inami, K. Nishioka, J. Kanasaki
    • Organizer
      15th International Conference on Laser Ablation (COLA 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Optical Control of Structural Transformation to Form Nano-scaled Order Phases Including sp3-like Bonds in Graphite2019

    • Author(s)
      E. Inami, K. Nishioka, J. Kanasaki, K. Tanimura
    • Organizer
      The 22nd SANKEN International Symposium/ The 17th SANKEN Nanotechnology International Symposium
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] フェムト秒時間分解光電子分光法による超高速キャリア動力学の多次元イメージング:第12回励起ナノプロセス研究会2017

    • Author(s)
      金﨑順一
    • Organizer
      応用物理学会 第12回励起ナノプロセス研究会
    • Place of Presentation
      淡路夢舞台国際会議場
    • Year and Date
      2017-03-29
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Momentum Space View of Ultrafast Carrier Dynamics in Photo-Excited Semiconductors2017

    • Author(s)
      J. Kanasaki
    • Organizer
      The 3rd Annual World Congress of Smart Materials 2017
    • Place of Presentation
      Bankok, Thailand
    • Year and Date
      2017-03-16
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Direct Imaging of Surface Electron Relaxation and Surface Conduction Band Structures of Ge(001) and (111) Surfaces2017

    • Author(s)
      J. Kanasaki, I. Yamamoto, J. Azuma, S. Fukatsu
    • Organizer
      Symposium on Surface Science & Nanotechnology 2017, Kyoto (Japan)
    • Place of Presentation
      京都国際交流会館
    • Year and Date
      2017-01-24
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Momentum Space View of Ultrafast Carrier Dynamics in Photo-excited Optoelectronic Semiconductors2017

    • Author(s)
      J. Kanasaki
    • Organizer
      The 2017 EMN Optoelectronics Meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 光による電子励起物性科学:励起キャリアの緩和動力学と新規表面構造相の創成2017

    • Author(s)
      金﨑順一
    • Organizer
      第7回物質・デバイス領域共同研究拠点活動報告会及び28年度ダイナミックアライアンス成果報告会
    • Related Report
      2017 Research-status Report
  • [Presentation] ゲルマニウムにおける励起電子系の超高速動力学2017

    • Author(s)
      金﨑順一、山本勇、東純平、深津晋
    • Organizer
      日本物理学会 2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 光による半導体表面構造秩序の変換2017

    • Author(s)
      金﨑順一
    • Organizer
      大阪大学産業科学研究所学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Band Structure and Electronic Dynamics at Ge(001) and (111) Surfaces2016

    • Author(s)
      J. Kanasaki, I. Yamamoto, J. Azuma, S. Fukatsu
    • Organizer
      The 20th SANKEN International, The 15th SANKEN Nanotechnology Symposium
    • Place of Presentation
      グランフロント大阪コングレコンベンションセンター
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 角度分解2光子光電子分光法によるGe(001)-c(4x2)表面非占有バンド構造の決定2016

    • Author(s)
      金﨑順一、山本勇、東純平
    • Organizer
      第36回表面科学学術講演大会
    • Place of Presentation
      名古屋国際会議場
    • Year and Date
      2016-11-29
    • Related Report
      2016 Research-status Report
  • [Presentation] Electronic Structure of Surface Conduction Band of Ge(001)-c(4x2) and Ge(111)-c(2x8) Surfaces Studied by Two-photon Photoelectron Spectroscopy2016

    • Author(s)
      J. Kanasaki, I. Yamamoto, J. Azuma
    • Organizer
      Atomically-Controlled Surfaces, Interfaces & Nanotechnology (ACSIN) 2016
    • Place of Presentation
      Rome, Italy
    • Year and Date
      2016-10-09
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] フェムト秒時間・角度分解光電子分光法による超高速キャリア緩和過程の多次元イメージング2016

    • Author(s)
      金﨑順一
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学
    • Year and Date
      2016-09-21
    • Related Report
      2016 Research-status Report
  • [Presentation] 時間角度分解2光子光電子分光法によるGe(001)-c(4x2)表面非占有バンド構造の決定2016

    • Author(s)
      金﨑順一、山本勇、東純平
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学
    • Year and Date
      2016-09-21
    • Related Report
      2016 Research-status Report
  • [Presentation] 光励起による半導体価電子正孔系の緩和動力学:時間・角度光電子分光法による観測2016

    • Author(s)
      谷村克己、谷村洋、金﨑順一
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学
    • Year and Date
      2016-09-21
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2021-02-19  

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