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Development of electron beam orbital angular momentum measurement method and its application research

Research Project

Project/Area Number 18H01884
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 29030:Applied condensed matter physics-related
Research InstitutionSaitama Institute of Technology

Principal Investigator

Uchida Masaya  埼玉工業大学, 付置研究所, 教授 (80462662)

Co-Investigator(Kenkyū-buntansha) 齋藤 晃  名古屋大学, 未来材料・システム研究所, 教授 (50292280)
桑原 真人  名古屋大学, 未来材料・システム研究所, 准教授 (50377933)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥12,480,000 (Direct Cost: ¥9,600,000、Indirect Cost: ¥2,880,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords電子ビーム / 量子ビーム / 軌道角運動量 / 電子顕微鏡 / 波動関数 / 超微細加工 / 粒子線 / 位相 / ボルテックス(特異点) / 回折格子 / 波動関数位相 / ボルテックス / 微細加工
Outline of Final Research Achievements

The goal of this research was to develop a method to measure the OAM of an electron beam and to conduct its application research. First, we developed a“Dammann vortex diffraction grating”-based detector (Noguchi et al., Phys. Rev. Applied, 2019). The developed“Dammann vortex diffraction grating” detector can simultaneously acquire OAM spectra. As one application of the measurement method, we measured the OAM generated by an electron beam passing through a nano-sized magnetic needle, and succeeded in measuring the OAM spectrum. We also proposed and demonstrated a novel convergent electron diffraction method using an electron beam with nonzero OAM as an incident beam (Saitoh et al., Microscopy, 2022).

Academic Significance and Societal Importance of the Research Achievements

本研究の学術的意義は世界で初めて研究代表者が生成した電子ビームの軌道角運動量(Uchidaら, Nature, 2010)が、電子ビームに普遍的であることの実証に資する軌道角運動量測定器の開発および測定法の開発を行ったことである。さらに、電子の軌道角運動量の測定によって磁場分布などの種々の物理量の取得できること、応用に役立つことを実際に示したことである。本研究は電子ビームや電子顕微鏡での応用にとどまらず、光・中性子・原子、あるいは素粒子物理分野へも大きなインパクトを与えている点で社会的意義が大きいと思われる。

Report

(5 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (5 results)

All 2021 2019 2018

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

  • [Journal Article] Efficient Measurement of the Orbital-Angular-Momentum Spectrum of an Electron Beam via a Dammann Vortex Grating2019

    • Author(s)
      Noguchi Yuuki、Nakayama Shota、Ishida Takafumi、Saitoh Koh、Uchida Masaya
    • Journal Title

      Physical Review Applied

      Volume: 12 Issue: 6 Pages: 064062-064062

    • DOI

      10.1103/physrevapplied.12.064062

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] 半平面状試料を透過した電子線の軌道角運動量解析2021

    • Author(s)
      米澤龍哉,齋藤 晃,内田正哉
    • Organizer
      日本顕微鏡学会第77回学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Orbital angular momentum spectrum measured by forked gratings and its relation to angular Fourier transform2019

    • Author(s)
      K. Saitoh,W. Li and M. Uchida
    • Organizer
      Microscopy Conference 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measuring the orbital angular momentum spectrum of electron beams using a Dammann vortex grating2018

    • Author(s)
      (1)Y. Noguchi,K. Saitoh,and M. Uchida
    • Organizer
      19TH INTERNATIONAL MICROSCOPY CONGRESS (Sydney)
    • Related Report
      2018 Annual Research Report
  • [Presentation] 2次元ダンマン渦渦回折格子をもちいた軌道角運動量測定2018

    • Author(s)
      齋藤 晃,野口雄紀,内田正哉
    • Organizer
      日本顕微鏡学会第74回学術講演会 (久留米市)
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2024-01-30  

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