Laser-induced metal sphere manipulation in glass

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H02035
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 18020:Manufacturing and production engineering-related
• Research Institution: Chiba University
• Principal Investigator: HIDAI HIROFUMI 千葉大学, 大学院工学研究院, 教授 (60313334)
• Co-Investigator(Kenkyū-buntansha): 森田 昇 千葉大学, 大学院工学研究院, 教授 (30239660) ; 松坂 壮太 千葉大学, 大学院工学研究院, 准教授 (30334171) ; 岸 哲生 東京工業大学, 物質理工学院, 助教 (90453828)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: ガラス / レーザ / ドープ / デドープ

Outline of Final Research Achievements

The researchers have reported the laser-induced metal sphere migration in the glass. The metal sphere migrated toward the light source along the optical axis. In this project, we studied the metal sphere migration process, metal-glass composition changes, and applications. The metal spheres moved fast with plasma emission, and their trajectory contained fine metal particles when the laser power density was high. The temperatures of the metal sphere with slow (<0.1 mm/s) and fast (>1 mm/s) speeds were 1,900 and 2,900 K, respectively. The formation of a stainless-steel core- silver shell sphere in the glass has been demonstrated by passing a stainless steel sphere through silver-doped borosilicate glass. Also, we demonstrated the metal sphere separation by two laser beam illumination from the opposite direction.

Free Research Field

レーザ加工

Academic Significance and Societal Importance of the Research Achievements

申請者らが見出したガラス内部での金属球のレーザマニピュレーションに関して，基礎的な理解と応用に必要な検討を行った．その結果，移動メカニズムを明らかした．ガラス内部において所望の位置，領域に金属を添加できることを示し，さらに逆にガラスの内部から，特定の元素を除き金属の内部に濃縮できることを見出した．ガラスの内部で金属球を分離できることを見出し，このメカニズムを明らかにした．これらから，ガラスの内部の所望の位置の組成を自由させ，様々な着色を施す可能性を示した．