Fabrication of semiconductor single-crystalline microspheres by laser ablation in superfluid helium

2015 Fiscal Year Final Research Report

• Project/Area Number: 26610086
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics I
• Research Institution: Osaka University
• Principal Investigator: Ashida Masaaki 大阪大学, 基礎工学研究科, 教授 (60240818)
• Co-Investigator(Kenkyū-buntansha): MINOWA Yosuke 大阪大学, 大学院基礎工学研究科, 助教 (50609691)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: レーザー加工 / レーザーアブレーション / 超流動ヘリウム / 微小光共振器

Outline of Final Research Achievements

We successfully for the first time fabricated semiconductor single-crystalline microspheres by laser ablation, where the surface of target materials are broken under the strong laser irradiation to obtain fine particles, in superfluid helium with extremely low temperature and low viscosity. This result is rather surprising, because it seems almost impossible to obtain single-crystalline microspheres of semiconductors which have their own crystal structures and tend to grow in their own shapes in normal conditions.

Free Research Field

光物性物理学