Understanding of formation dynamics of femtosecond-laser-induced periodic structures on SiC substrate

2018 Fiscal Year Final Research Report

• Project/Area Number: 17K14111
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Crystal engineering
• Research Institution: Nagoya Institute of Technology
• Principal Investigator: Miyagawa Reina 名古屋工業大学, 工学(系)研究科(研究院), 助教 (10635197)
• Research Collaborator: ERYU Osamu ; OHNO Yutaka ; MIYAKE Hideto ; TAIRA Takunori ; WELLMANN Peter
• Project Period (FY): 2017-04-01 – 2019-03-31
• Keywords: フェムト秒レーザー / ナノ周期構造 / 結晶

Outline of Final Research Achievements

Femtosecond-laser-induced periodic structures have less periodicity than the wavelength of the incident laser. In this study, I attempted to clarify the dynamics of the formation of the periodic structures.
The periodic structures were formed by superimposed pulses, and the periodicity changed with the pulse number. The periodicity and the crystallinity depended on the irradiated material. For the application as quantum devices, anisotropic wet etching was also effective to narrow the width in 1/4 and keep the structures crystalline.

Free Research Field

結晶工学

Academic Significance and Societal Importance of the Research Achievements

フェムト秒レーザー誘起周期構造の形成メカニズムについて、近年活発な議論がなされているが、その結晶状態については調べられていなかった。本研究で明らかにした、被照射材料に依る結晶状態の違いは、光と結晶との相互作用を理解する上で重要な知見になると考える。また、形状と結晶状態を制御することで、その特性を活かした表面創成による機能的応用と、フェムト秒レーザーの応用拡大に繋げていく。