Formation Mechanism of Nanostructures on the Stainless Steel Surface by Femtosecond Laser Pulses

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In this paper, we report on the formation of a variety of micro/nano-metric structures on the stainless steel surfaces by single-beam direct femtosecond laser writing. Periodic microgratings of different line widths and period are fabricated on the sample surfaces. Random nanostructures are observed inside the microgratings, when laser pulses with low laser energies are applied on the samples. Unlike random nanostructures, periodic nanostructures are produced inside the microgratings, when laser pulses with high average pulse energy are applied. Besides, self-organized nanogratings, with variable periods, are formed all over the micro-machined area on the stainless steel surfaces due to the overlap of the microgratings, where the orientation of the nanogratings is parallel to the incident light polarization. Finally, we illustrate the formation mechanism of various kinds of nanostructures, produced on the stainless steel surfaces during our experiment.
Publisher
JAPAN LASER PROCESSING SOC
Issue Date
2012-05
Language
English
Article Type
Article
Keywords

METALS; ABLATION; TITANIUM

Citation

JOURNAL OF LASER MICRO NANOENGINEERING, v.7, no.2, pp.164 - 170

ISSN
1880-0688
DOI
10.2961/jlmn.2012.02.0007
URI
http://hdl.handle.net/10203/101850
Appears in Collection
EE-Journal Papers(저널논문)
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