2013 Fiscal Year Final Research Report
Dynamic process of ultrashort-pulse laser pumped nanostructure formation in attosecond time scale and its application
| Project/Area Number |
23360034
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
MIYAZAKI KENZO 京都大学, エネルギー理工学研究所, 研究員 (50293957)
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| Co-Investigator(Kenkyū-buntansha) |
MIYAJI Godai 東京農工大学, 工学(系)研究科(研究院), 准教授 (30378905)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | フェムト秒レーザー / アブレーション / ナノ周期構造 / 表面プラズモン・ポラリトン / 近接場 / ナノ格子 / アト秒 / レーザープロセッシング |
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| Research Abstract |
We have demonstrated that periodic nanostructure formation on dielectric, semiconductor, and metal surfaces irradiated with femtosecond laser pulses is dominated by the excitation of surface plasmon polaritons (SPPs), through the time-resolved measurements. Modeling the physical process of nanostructuring, we have developed a new ablation technique to control the excitation of spatial SPP wave modes and directly imprint a homogeneous nanograting on solid surfaces in air. It is also shown, based on the mechanism, that the nanograting period can be reduced by making use of shorter-wavelength lasers. Thus this project has successfully developed the fundamental principle and technique of a new nanoprocessing that can fabricate nanogratings with lasers beyond the diffraction limit.
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