Journal
APPLIED SURFACE SCIENCE
Volume 282, Issue -, Pages 729-734Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2013.06.043
Keywords
Laser material processing; Surface structuring; Femtosecond phenomena; Nanostructure fabrication
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Funding
- Natural Science and Engineering Research Council
- Canadian Foundation for Innovation
- Ontario Ministry of Economic Development and Innovation
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We show that femtosecond laser ablation of poly-methyl methacrylate (PMMA) induces porosity within the ablation crater that increases with pulse energy/fluence and number of laser shots. For deeper craters the porosity evolves into 3D honeycomb like structure on the sidewalls. Using imaging technique, we show that the porous area fraction decreases with pulse energy while the pore size distribution peaks at a pore area of 0.037 mu m(2) at higher energies. In line ablation, the pore size increases with the speed at which the laser focus is moved. (C) 2013 Elsevier B.V. All rights reserved.
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