Formation of extraordinarily uniform periodic structures on metals induced by femtosecond laser pulses

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作者
Wang, Jincheng [1 ]
Guo, Chunlei [1 ]
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[1] Institute of Optics, University of Rochester, Rochester, NY 14627
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Journal of Applied Physics | 2006年 / 100卷 / 02期
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In this paper; we report an observation of extraordinarily uniform periodic structures on metals following p-polarized femtosecond laser pulses at various obliquely incident angles. The highly uniform structures are oriented parallel to the laser polarization. Angular dependence of the period of these structures is studied; and the results indicate that these structures are formed by the interference between the incident light and excited surface plasmons. Under identical experimental conditions; these highly uniform structures show distinctly different levels of morphological clearness on different metals; and this difference can be explained by considering the electron-phonon coupling strength in different metals. © 2006 American Institute of Physics;
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