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EELS analysis of surface plasmon vibrational modes as the origin of short-range Casimir force

Research Project

Project/Area Number 18K04872
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 28020:Nanostructural physics-related
Research InstitutionHokkaido University

Principal Investigator

Sakaguchi Norihito  北海道大学, 工学研究院, 准教授 (70344489)

Co-Investigator(Kenkyū-buntansha) 國貞 雄治  北海道大学, 工学研究院, 助教 (00591075)
松尾 保孝  北海道大学, 電子科学研究所, 教授 (90374652)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords表面プラズモン共鳴 / STEM-EELS / 金属平板 / MIM構造 / Casimir力 / 近距離Casimir力 / 表面プラズモン / ナノギャップ / カシミール力 / EELS / EELS解析
Outline of Final Research Achievements

In order to clarify the surface plasmon interaction between metal plates, which is important for the evaluation of the short-range Casimir force, we fabricated metal/insulator/metal (MIM) structure and analyzed the relationship between the the interaction energy and the gap spacing by EELS measurements. The surface plasmon resonance energies excited at the Ag/silica and Ag/alumina interface are 3.3 eV and 3.0 eV, respectively. In the MIM structure, the resonance energy shifted to the high energy side as the gap spacing became narrower. It was experimentally shown that the surface plasmon interaction has a significant effect on the Casimir effect between metal plates with a gap spacing of less than 100 nm.

Academic Significance and Societal Importance of the Research Achievements

本研究では、近距離Casimir力に寄与する表面プラズモン相互作用の影響が、特に100nm以下の金属板間で大きくなることを明らかにした。このような微小空間に働く力は、ナノメカニカルデバイスの動作に影響を及ぼすことも指摘されている。さらに、このような力は例えばロンドン分散力とともにコロイドの凝集・分散に影響を及ぼすことも指摘されており、今後その距離依存性を定式化することができればナノ・メゾスケールにおけるデバイス設計に大きな役割を果たすことができるようになる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2020 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results)

  • [Journal Article] Interaction of Localized Surface Plasmons of a Silver Nanosphere Dimer Embedded in a Uniform Medium: Scanning Transmission Electron Microscopy Electron Energy-Loss Spectroscopy and Discrete Dipole Approximation Simulation2019

    • Author(s)
      Sakaguchi Norihito、Matsumoto Shuji、Kunisada Yuji、Ueda Mikito
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 123 Issue: 11 Pages: 6735-6744

    • DOI

      10.1021/acs.jpcc.8b11434

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] MIM構造における伝搬型表面プラズモン結合モードのEELS測定2020

    • Author(s)
      板谷健太郎,坂口紀史,國貞雄治,松尾保孝
    • Organizer
      日本顕微鏡学会第63回シンポジウム「顕微鏡オンラインフォーラム2020」
    • Related Report
      2020 Annual Research Report
  • [Presentation] 誘電体/金属界面における表面プラズモンの解析2020

    • Author(s)
      坂口紀史,板谷健太郎,國貞雄治,松尾保孝
    • Organizer
      日本顕微鏡学会第76回学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Agナノ粒子ダイマーにおける局在表面プラズモン共鳴のEELS解析2020

    • Author(s)
      坂口 紀史,松本 周士,國貞 雄治
    • Organizer
      令和元年度日本金属学会・日本鉄鋼協会両支部合同冬季講演大会
    • Related Report
      2019 Research-status Report
  • [Presentation] ガラス中に埋め込まれたAg粒子対のSTEM-EELS解析2018

    • Author(s)
      坂口紀史,松本周士,國貞雄治
    • Organizer
      日本顕微鏡学会第74回学術講演会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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