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Visualization of submicron localized light using electron beams

Research Project

Project/Area Number 22K18974
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 29:Applied condensed matter physics and related fields
Research InstitutionOsaka University

Principal Investigator

Yamasaki Jun  大阪大学, 超高圧電子顕微鏡センター, 教授 (40335071)

Co-Investigator(Kenkyū-buntansha) 畑中 修平  大阪大学, 超高圧電子顕微鏡センター, 技術職員 (30838503)
近藤 正彦  大阪大学, 大学院工学研究科, 教授 (90403170)
森藤 正人  大阪大学, 大学院工学研究科, 招へい准教授 (00230144)
Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2023: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2022: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Keywords局在光 / 電子線偏向 / 電子顕微鏡 / パルス電子ビーム / 小角散乱
Outline of Research at the Start

1μm以下程度の範囲に局在した光に向けて電子ビームを照射し、方向の変化を精密測定することによって光強度分布を可視化する手法を開発する。実験には透過電子顕微鏡にレーザーを組み合わせた装置を用いる。電子顕微鏡内の試料観察位置にレーザー光を集光するために、レンズまたは凹面鏡を取り付けた試料ホルダーを制作する。真空中と物質中に形成される局在光を計測対象として実験を行い、シミュレーションとの比較から計測結果の評価を行う。

Outline of Final Research Achievements

We have developed a completely new imaging technique to visualize light localized at micron to submicron sizes utilizing the phenomenon of electron beam deflection caused by a light intensity gradient. Using a femtosecond laser, a focused light spot was formed inside a transmission electron microscope. By precisely measuring the deflection angle of a pulsed electron beam synchronized with the spot forming, we have succeeded in capturing a deflection that is believed to reflect the intensity gradient of the localized light.

Academic Significance and Societal Importance of the Research Achievements

フォトニック結晶などに代表される次世代の光デバイス技術の開発が進んでおり、信号として用いる光の空間的な局在性を可視化することにより動作原理の検証や高性能化に貢献しうるという社会的意義を持つ。またミクロの世界を可視化する電子顕微鏡の観察対象は原子核と電子からなる物質構造に概ね限定されているが、本課題は観察対象を光子にまで広げるという学術的意義を持ち、その第一歩となる基礎的な取り組みに成功した。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (9 results)

All 2024 2023 2022

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (8 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Ultrafast dynamics of a photoinduced phase transition in single-crystal trititanium pentoxide2023

    • Author(s)
      Shuhei Hatanaka, Taro Tsuchiya, Shuhei Ichikawa, Jun Yamasaki, Kazuhisa Sato
    • Journal Title

      Applied Physics Letters

      Volume: 123 Issue: 24 Pages: 241902-241902

    • DOI

      10.1063/5.0175450

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Presentation] パルス電子顕微鏡によるTi3O5の光誘起相転移の時間分解観察2024

    • Author(s)
      畑中 修平
    • Organizer
      2023年度 日本顕微鏡学会 超高分解能顕微鏡法分科会 研究討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] パルス電子顕微鏡を用いたTi3O5の光励起相転移の時間分解観察2024

    • Author(s)
      畑中 修平、土屋 汰朗、市川 修平、山﨑 順、佐藤 和久
    • Organizer
      第71回応用物理学会春季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Edge Structure Optimization for Improving Output Power of Circular Defect in Photonic Crystal Laser2023

    • Author(s)
      Yuki Adachi, Rintaro Maji, Yuto Kudo, Masato Morifuji, Hirotake Kajii, Akihiro Maruta, Jun Yamasaki, and Masahiko Kondow
    • Organizer
      Photonic Device Workshop 2023 (PDW2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Wavelength properties of CirD (Circular Defect in 2D photonic crystal) Laser with aluminum oxide cladding layers having OLW (Orthogonal Lattice Waveguide) with air cladding layers2023

    • Author(s)
      Kazuki Sato, Hikari Kubota, Yuki Adachi, Masato Morifuji, Hirotake Kajii, Akihiro Maruta, Jun Yamasaki, and Masahiko Kondow
    • Organizer
      Photonic Device Workshop 2023 (PDW2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Theoretical Study on Light Output from Orthogonal Lattice Waveguide Edge in Circular Defect in Two-dimensional Photonic Crystal (CirD) Laser2023

    • Author(s)
      Hikari Kubota, Kazuki Sato, Yuki Adachi, Masato Morifuji, Hirotake Kajii, Akihiro Maruta, Jun Yamasaki, and Masahiko Kondow
    • Organizer
      Photonic Device Workshop 2023 (PDW2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 超高速電子顕微鏡を用いたTi3O5の光誘起相転移その場観察2022

    • Author(s)
      畑中 修平, 土屋 汰朗, 市川 修平, 佐藤 和久, 山﨑 順
    • Organizer
      日本顕微鏡学会 第78回学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] パルス電子顕微鏡によるTi3O5の光誘起相転移の時間分解観察2022

    • Author(s)
      畑中修平, 土屋汰朗, 市川修平, 山﨑順, 佐藤和久
    • Organizer
      日本物理学会 2022年秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Time-resolved observation of photoinduced phase transition of trititanium pentoxide by ultrafast electrton microscopy2022

    • Author(s)
      Shuhei Hatanaka, Taro Tsuchiya, Shuhei Ichikawa, Jun Yamasaki and Kazuhisa Sato
    • Organizer
      14th International Symposium on Atomic Level Characterizations for New Materials and Devices '22 (ALC'22)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2022-07-05   Modified: 2025-01-30  

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