How to get deeper structures with the same energy: Fabrication of periodic structures in stainless steel using Direct Laser Interference Patterning with burst mode ps-pulses

• Published in: Materials letters Vol. 246; pp. 121 - 124
• Main Authors: Ströbel, Joachim, Voisiat, Bogdan, Du, Keming, Lasagni, Andrés F.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.07.2019; Elsevier BV
• Subjects: Ablation; Burst mode; Direct Laser Interference Patterning; Fluence; Infrared lasers; Interference; Laser induced periodic surface structures; Lasers; Materials science; Patterning; Periodic structures; Stainless steel; Stainless steels; Steel structures; Substrates; Direct Laser Interference Patterning; Burst mode; Laser induced periodic surface structures
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2019.03.051

[Display omitted] •Significant improvement of ablation efficiency using burst pulses.•Creation of high-aspect ratio surface patterns.•High homogeneity and surface pattern quality with resolution in the micrometer range. In this study, stainless steel substrates were treated with laser interference patterns using burst of pulses. The main objective is to evaluate their influence in the ablation mechanism using the Direct Laser Interference Patterning method. Using a 10 ps infrared laser system operating with low and high fluence levels and different pulse overlaps, a lower efficiency in the ablation process was observed for the low energy case, while at high fluences an improvement of the ablation efficiency up to 31% was observed. In addition, it was found that overlaps higher than 97.6% significantly deteriorate the pattern quality.