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Highlight Lecture

WEB Going faster and faster: How Direct Laser Interference Patterning method can be used for high-throughput functionalization of surfaces

Wednesday (23.09.2020)
11:20 - 11:35 F: Functional Materials, Surfaces, and Devices 2
Part of:

This presentation describes the last developments for the high-throughput functionalization of surfaces using Direct Laser Interference Patterning. Based on theoretical calculations regarding laser-matter interaction phenomena with materials, different strategies describing how to distribute the laser power on the materials surface have been developed. Later, these strategies are used for producing dot and line-like periodic surface structures on metals, using new developed optical configurations. The optical setups have been optimized, for instance by shaping the beam profiles to elongated rectangular laser spots (with approximately 5.0-10 mm x 0.1 mm size) or by combining the DLIP optics with a scanner system. Later, aluminum and stainless steel substrates are processed using a nanosecond and picosecond pulsed laser source delivering up to 13 W and 180 W of laser power for the 10 ps and 10 ns systems, respectively. Depending on the pulse repetition rate applied as well as the pulse duration, a significant heating of the substrate volume was observed for the ns pulses. In this way, structures with exceptionally high aspect ratios could be produced driven by Marangoni convection mechanisms. Finally, different properties affected by the laser treatment are described, including water contact angle measurements, optical decorative elements and reducing ice-formation. Also, the applicability of the DLIP scanner technology for decorative applications is shown.

Acknowledgments: the work of A.F.L. has received funding from the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 825132. It is an initiative of the Photonics Public Private Partnership. This content reflects only the authors' view and the European Commission and Photonics 21 are not responsible for any use that may be made of the information it contains. The work of S.A. and A.I.A. was carried out in the framework of the LASER4FUN project, which has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 675063. The work of T.K., T.S. and A. M. was funded from the European Union’s Horizon 2020 Framework Program for research and innovation under grant agreement no. 768701.


Additional Authors:
  • Dr. Valentin Lang
    Technische Universität Dresden
  • Aleksander Madelung
    Fraunhofer IWS
  • Sabri Alamri
    Fraunhofer IWS
  • Dr. Bogdan Voisiat
    Technische Universität Dresden
  • Alfredo Aguilar
    Fraunhofer IWS
  • Dr. Tim Kunze
    Fraunhofer IWS
  • Benjamin Krupop
    Fraunhofer IWS
  • Tobias Steege
    Fraunhofer IWS