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Proceedings Paper

Generation of extended-area femtosecond laser induced periodic nanostructures on TiO2 by moving samples through a line focus
Author(s): K. Dasari; S. K. Das; A. Rosenfeld; R. Grunwald
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Paper Abstract

The combination of sample translation and line focusing by cylindrical optics is shown to be a convenient and highly effective way of generating laser induced coherent periodic surface structures (LIPSS) in TiO2 over significantly extended areas. Compared to known techniques based on a sample translation relative to a circular symmetric focus, the approach is much less time consuming and requires only a single translation stage. The capability of the method to form both high and low spatial frequency LIPSS (HSFL, LSFL) at the second harmonic wavelengths of a Ti:sapphire-laser (around 400 nm) at properly chosen scanning velocity and laser pulse energies is demonstrated. Structured multi-mm2 areas with periods of 80 nm and 325 nm were obtained corresponding to distinct sets of optimized parameters. Furthermore, the appearance of nano-bumps on 30 nm scale on the surface of the LSFL is reported. Basic technical issues are discussed and potential applications of LIPSS in rutile-type TiO2 like superwetting, friction control, catalysis and photovoltaic are proposed.

Paper Details

Date Published: 26 February 2010
PDF: 8 pages
Proc. SPIE 7586, Synthesis and Photonics of Nanoscale Materials VII, 75860K (26 February 2010); doi: 10.1117/12.840493
Show Author Affiliations
K. Dasari, VIT Univ. (India)
S. K. Das, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany)
A. Rosenfeld, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany)
R. Grunwald, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany)


Published in SPIE Proceedings Vol. 7586:
Synthesis and Photonics of Nanoscale Materials VII
Jan J. Dubowski; David B. Geohegan; Frank Träger, Editor(s)

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