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Proceedings Paper

Periodic ripples produced by a scanning beam of a femtosecond Ti:sapphire laser
Author(s): E. Freysz; S. M. Pershin; G. A. Shafeev
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Paper Abstract

The formation of periodic ripples is reported under exposure in air of several solids (Ge, GaAs, W, steel, etc.) to a scanning beam of a femtosecond Ti:sapphire laser operating at wavelength λ = 810 nm. Atomic Force Microscope (AFM) and Scanning Electron Microscope (SEM) characterization shows that the period of ripples at normal incidence of laser radiation lies in a sub-λ domain and depends on the nature of the solid. Ripples are oriented perpendicular to the plane of polarization of the laser beam. Their period is different under ablation of a solid in a liquid environment at otherwise equal conditions. The results are interpreted as an interference of the incident laser radiation with a surface electromagnetic wave induced in the solid. The examples are presented of sub-μm structures generated by intersection of several ripple arrays.

Paper Details

Date Published: 7 June 2005
PDF: 6 pages
Proc. SPIE 5850, Advanced Laser Technologies 2004, (7 June 2005); doi: 10.1117/12.633678
Show Author Affiliations
E. Freysz, Univ. Bordeaux 1 (France)
S. M. Pershin, General Physics Institute (Russia)
G. A. Shafeev, General Physics Institute (Russia)


Published in SPIE Proceedings Vol. 5850:
Advanced Laser Technologies 2004

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