Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5368694 | Applied Surface Science | 2006 | 4 Pages |
Abstract
Subwavelength ripples (<λ/4) are obtained by scanning a tightly focused beam (â¼1 μm) of femtosecond laser radiation (λ = 800 nm, tp = 100 fs) over the surface of either bulk fused silica and silicon and Er:BaTiO3. The ripple pattern extends coherently over many overlapping laser pulses parallel and perpendicular to the polarisation. Investigated are the dependence of the ripple spacing on the spacing of successive pulses, the direction of polarisation and the material. The evolution of the ripples is investigated by applying pulse bursts with N = 1 to 20 pulses. The conditions under which these phenomena occur are specified, and some possible mechanisms of ripple growth are discussed. Potential applications are presented.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Ralph Wagner, Jens Gottmann, Alexander Horn, Ernst Wolfgang Kreutz,