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Induced structure control in transparent materials by combining multi-point simultaneous irradiation and energy modulation of pulsed laser

Research Project

Project/Area Number 20H02482
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26050:Material processing and microstructure control-related
Research InstitutionKyoto University

Principal Investigator

Miura Kiyotaka  京都大学, 工学研究科, 教授 (60418762)

Co-Investigator(Kenkyū-buntansha) 清水 雅弘  京都大学, 工学研究科, 助教 (60704757)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2022: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2021: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2020: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Keywordsレーザー / ガラス / 単結晶 / パルスレーザー
Outline of Research at the Start

①ガラスのような非晶質材料においては局所的な温度分布の形状・サイズ制御による元素分布制御を、②単結晶材料においては集光点から発生する衝撃波の干渉を利用した切断形状あるいは構造制御に関する知見を得る研究と、③これらとレーザーパルスの時間変調による連続走査照射とを組み合わせることで新たに誘起される現象を追う。

Outline of Final Research Achievements

The thermal diffusion equation was used to simulate the time variation of the temperature distribution in the molten region during multi-point simultaneous irradiation. Furthermore, the spatial viscosity distribution was calculated from the obtained temperature gradient using the relationship between viscosity and temperature given by Fulcher's equation.
We have established a transient stress observation system that can observe stress changes on the picosecond to nanosecond scale. Furthermore, a theoretical analysis of the stress distribution was performed by elastic dynamics simulation.
A polarization high-speed imaging camera was used to observe the temporal change in the magnitude of birefringence generated inside the glass during laser scanning. The moving phenomenon (vertical movement) observed with a high-speed camera was reproduced by FDTD calculation, using the plasma generated at the laser focusing part as a perfectly conductive sphere.

Academic Significance and Societal Importance of the Research Achievements

非晶質内部の空間的な局所温度勾配制御による元素分布領域の形状・サイズ制御や単結晶内部における衝撃波の干渉を利用したクラックの伸長制御を実験的に調べ、その挙動をシミュレーションにより再現する手法を確立したことで、現象のメカニズムの解明に加えプロセス条件や材料設計においても重要な知見を得ることが出来る。さらに、れらの現象をパルスエネルギーに変調をかけた状態で連続的に材料内部に誘起させる方法と組み合わせることで、新規な材料プロセッシングの開発や、材料への新たな機能発現が期待できる。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (9 results)

All 2023 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (7 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Composition-dependent sign?inversion of the Soret coefficient of SiO<sub>2</sub> in binary borosilicate melts2022

    • Author(s)
      Shimizu Masahiro、Sato Kenzo、Nakashima Kento、Kiyosawa Tomohiro、Matsuoka Jun、Shimotsuma Yasuhiko、Miura Kiyotaka
    • Journal Title

      The Journal of Chemical Physics

      Volume: 156 Issue: 21 Pages: 214504-214504

    • DOI

      10.1063/5.0090939

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] フェムト秒レーザー加熱によるガラス内部の機能化 ―局所結晶析出と組成変化―2022

    • Author(s)
      坂倉政明、下間靖彦、清水雅弘、三浦清貴
    • Journal Title

      レーザー研究

      Volume: 03 Pages: 122-127

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] MgO単結晶内部の光誘起構造変化2023

    • Author(s)
      櫻井平良、下間靖彦、清水雅弘、三浦清貴
    • Organizer
      レーザー学会学術講演会第43回年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] アルミノケイ酸塩ガラス融液における温度勾配下でのSiO2成分の拡散挙動2022

    • Author(s)
      西田悠馬、清水雅弘、下間靖彦、三浦清貴
    • Organizer
      日本セラミックス協会第35回秋季シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 赤外透過フッ化物単結晶内部の光誘起構造変化2021

    • Author(s)
      遠山幸、下間靖彦、清水雅弘、三浦清貴
    • Organizer
      レーザー学会学術講演会第42回年次大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Self-assembled nanocrystals with YAG structure induced by femtosecond laser irradiation2021

    • Author(s)
      Y. Shimotsuma, T. Okuno, M. Shimizu, K. Miura
    • Organizer
      The 22nd International Symposium on Laser Precision Microfabrication
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] エネルギー変調したピコ秒パルス列によるSiC結晶内部加工2021

    • Author(s)
      水田朋希、下間靖彦、清水雅弘、三浦清貴
    • Organizer
      第41回レーザー学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 温度勾配下におけるナトリウムケイ酸塩ガラス融液の組成分布と構造覧2020

    • Author(s)
      清水 雅弘、福與 翼、松岡 純、中嶋 健斗、佐藤 乾蔵、清澤 友博、下間 靖彦、三浦 清貴
    • Organizer
      日本セラミックス協会-第33回秋季シンポジウム
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Composition dependence of the Soret effect in binary B2O3-SiO2 glass melts2020

    • Author(s)
      Kenzo Sato, Masahiro Shimizu, Jun Matsuoka, Yasuhiko Shimotsuma, Kiyotaka Miura
    • Organizer
      Glass meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2024-01-30  

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