Angular effects of nanostructure-covered femtosecond laser induced periodic surface structures on metals

In this paper, we study nanostructure-covered laser induced periodic surface structures (NC-LIPSSs) on metals produced by femtosecond laser pulses incident at various angles. For the first time, we show that the dependence of NC-LIPSS period on the incident beam angle deviates significantly from that of regular LIPSSs studied previously using longer laser pulses. Our study shows that this deviation is due to the nanostructures on LIPSSs that can be explained by the Maxwell–Garnett theory of effective media.

[1]  W. Kautek,et al.  Femtosecond laser ablation of silicon–modification thresholds and morphology , 2002 .

[2]  P. Sheng.  Theory for the Dielectric Function of Granular Composite Media , 1980 .

[3]  John E. Sipe,et al.  Laser-induced periodic surface structure. III. Fluence regimes, the role of feedback, and details of the induced topography in germanium , 1984 .

[4]  J. Garnett,et al.  Colours in Metal Glasses and in Metallic Films. , 1904, Proceedings of the Royal Society of London.

[5]  M. D. Coutts,et al.  Optical Properties of Granular Silver and Gold Films , 1973 .

[6]  R. J. Bell,et al.  Optical properties of the metals Al, Co, Cu, Au, Fe, Pb, Ni, Pd, Pt, Ag, Ti, and W in the infrared and far infrared. , 1983, Applied optics.

[7]  Jeff F. Young,et al.  Laser-induced periodic surface structure. I. Theory , 1983 .

[8]  Y. Shimotsuma,et al.  Self-organized nanogratings in glass irradiated by ultrashort light pulses. , 2003, Physical review letters.

[9]  Mikhail N. Libenson,et al.  Surface electromagnetic waves in optics , 1992 .

[10]  Chunlei Guo,et al.  Ultrafast dynamics of femtosecond laser-induced periodic surface pattern formation on metals , 2005 .

[11]  Chunlei Guo,et al.  Surface-plasmon-enhanced photoelectron emission from nanostructure-covered periodic grooves on metals , 2009 .

[12]  Philippe M. Fauchet,et al.  Growth of spontaneous periodic surface structures on solids during laser illumination , 1982 .

[13]  E. Palik.  Handbook of Optical Constants of Solids , 1997 .

[14]  Zhizhan Xu,et al.  Formation of nanogratings on the surface of a ZnSe crystal irradiated by femtosecond laser pulses , 2005 .

[15]  Ruediger Grunwald,et al.  Femtosecond laser-induced periodic surface structures revisited: A comparative study on ZnO , 2009 .

[16]  Chunlei Guo,et al.  Formation of extraordinarily uniform periodic structures on metals induced by femtosecond laser pulses , 2006 .

[17]  Chunlei Guo,et al.  Periodic ordering of random surface nanostructures induced by femtosecond laser pulses on metals , 2007 .

[18]  Yoshiharu Namba,et al.  Regular subwavelength surface structures induced by femtosecond laser pulses on stainless steel. , 2009, Optics letters.

[19]  Clark,et al.  Ultraviolet-laser-induced periodic surface structures. , 1989, Physical review. B, Condensed matter.