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3 dimensional helical metastructures fabricated by optical vortex

Research Project

Project/Area Number 22K18981
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 30:Applied physics and engineering and related fields
Research InstitutionChiba University

Principal Investigator

Omatsu Takashige  千葉大学, 大学院工学研究院, 教授 (30241938)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords光渦 / 軌道角運動量 / 光重合 / キラリティー / 光物性物理学 / キラル秩序 / 特異点光学 / 光マニピュレーション
Outline of Research at the Start

研究代表者は「光渦を物質(金属・半導体・有機薄膜など)に照射すると物質表面でキラルな質量移動が起こり、物質表面にサブミクロンスケールの螺旋構造ができること」を発見した。現象の発見からすでに10年近くの年月が経過し、この間、国内外(日本、ロシア、カナダ、スペインなど)で数多くの研究がなされてきた。しかしながら、光渦による螺旋構造に関する事例のすべてが、未だ物質表面あるいは物質同士の界面に限定されている。
本研究は、「なぜ物質内部に螺旋構造ができないのだろうか?」という学術的な問いを解明を解明し、3次元螺旋構造、すなわち、メタ螺旋構造を光渦照射だけで創成することに挑戦する。

Outline of Final Research Achievements

An optical vortex induced self-written helical microfiber with a micron-scale diameter and a millimeter-scale length via OAM transfer effects has been successfully demonstrated. Such self-written helical fiber enables potentially the delivery or mode conversion of optical vortices as an eigen mode.
A homemade continuous-wave green laser was used, and its output was converted into a first-order Bessel beam by a spiral phase plate and an Axicon lens. The generated Bessel beam was focused on a cell containing a cure resin by an objective lens. The rotation of the transmitted light occurred, manifesting the self-trapping effects of the optical vortex with the formation of a fiber owing to OAM transfer effects. Interestingly, the vortex mode with an annular spatial form was generated from the fabricated fiber by the injection of Gaussian beam, manifesting that the fabricated helical fiber acts as a waveguide for mode coupling between the Gaussian and the vortex modes.

Academic Significance and Societal Importance of the Research Achievements

キラリティーは物質科学における普遍的テーマである。光渦は、螺旋波面に由来する軌道角運動量と螺旋波面の向きで決まるキラリティーを持つ光である。光渦を物質に照射すると軌道角運動量が作用してキラルな量移動が起こり、物質表面にサブミクロンスケールの螺旋構造ができることを研究代表者は世界で初めて発見した。しかしながら、これまでの螺旋構造に関する事例のすべては、物質表面に限定されていた。
物質内部の構造を力学的に捩じって螺旋構造を形成した本研究成果は、人工生体シ組織シミュレーター、光を非損失で一方向伝播させることができるトポロジカル光デバイスなど、メタ螺旋構造を有する素子として展開が期待できる。

Report

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

    (5 results)

All 2024 2023 2022

All Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (1 results) (of which Invited: 1 results)

  • [Journal Article] Generation of high-order optical vortices with nanostructured phase masks2024

    • Author(s)
      Nguyen Hue Thi、Kasztelanic Rafal、Pysz Dariusz、Le Hieu Van、Stepien Ryszard、Omatsu Takashige、Krolikowski Wieslaw、Buczynski Ryszard
    • Journal Title

      Optics and Laser Technology

      Volume: 172 Pages: 110490-110490

    • DOI

      10.1016/j.optlastec.2023.110490

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Laser slicing of a diamond at the {100} plane using an irradiation sequence that restricts crack propagation along the {111} plane2023

    • Author(s)
      Sakamoto Kosuke、Tokunaga Daijiro、Itoh Sho、Hidai Hirofumi、Matsusaka Souta、Omatsu Takashige、Koyama Koji、Kim Seong-Woo、Morita Noboru
    • Journal Title

      Diamond and Related Materials

      Volume: 136 Pages: 110045-110045

    • DOI

      10.1016/j.diamond.2023.110045

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Red, orange, and dual wavelength vortex emission from Pr:WPFGF fiber laser using a microscope slide output coupler2023

    • Author(s)
      Kerridge-Johns William R.、Srinivasa Rao A.、Fujimoto Yasushi、Omatsu Takashige
    • Journal Title

      Optics Express

      Volume: 31 Issue: 10 Pages: 16607-16607

    • DOI

      10.1364/oe.491867

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Laser-induced forward-transfer with light possessing orbital angular momentum2022

    • Author(s)
      Omatsu Takashige、Miyamoto Katsuhiko、Yuyama Ken-Ichi、Yamane Keisaku、Morita Ryuji
    • Journal Title

      Journal of Photochemistry and Photobiology C: Photochemistry Reviews

      Volume: 52 Pages: 100535-100535

    • DOI

      10.1016/j.jphotochemrev.2022.100535

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 光渦レーザーの開発と物質科学への展開2022

    • Author(s)
      尾松孝茂
    • Organizer
      レーザー総研成果報告会, 泰山賞受賞記念講演
    • Related Report
      2022 Research-status Report
    • Invited

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

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