Interfering Ultraviolet Femtosecond Laser Processing of Gold Thin Film and Prospect of Shortest Period
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概要
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An interfering UV femtosecond laser was firstly applied to material processing. The second-harmonic wave of a femtosecond laser at 392.5 nm was split into four 1st- and one 0th-order beams by a transmission beam splitter, and interfered on a gold thin film target through a demagnification system as a beam correlator consisting of two convex lenses. A nanobump superlattice structure was fabricated in a single shot of a laser at far lower fluence, which is about 1/20 of that using fundamental wavelength. In addition, the shortest interference period was estimated as 830 nm using a demagnification autocorrelation system with standard plano-convex lenses.
- 2012-10-25
著者
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Nakata Yoshiki
Institute Of Laser Engineering Osaka University
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Miyanaga Noriaki
Institute Laser Engineering Osaka University
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MURAKAWA Keiichi
Institute of Laser Engineering, Osaka University
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Momoo Kazuma
Telecommunication Project Department, Sumitomo Corporation, Chuo, Tokyo 104-8610, Japan
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