2.5D femtosecond laser microstructuring of complex surface patterns

Petelin, Jaka (avtor), Kočica, Jernej Jan (avtor), Mur, Jaka (avtor), Petkovšek, Rok (avtor)

Surface structuring aimed at improving aerodynamic, hydrodynamic, and wetting properties has gained traction as methods of material processing evolved and the need for highly efficient manufacturing manifested. Femtosecond laser processing has matured as a manufacturing method but remains limited in throughput and scalability due to the high precision required. Here we present a new concept for 2.5-dimensional surface structuring that simultaneously improves processing throughput and precision compared to traditional laser surface structuring approaches, leveraging the pulse-on-demand capabilities of the latest femtosecond laser sources. The approach is compatible with any repeatable and predictable scanning system, where we demonstrate an up to 10-fold increase in processing throughput compared to standard layer-by-layer material removal. Moreover, the precise pulse emission timing enables near-continuous variation in the laser pulse repetition rate, achieving pulse positioning precision equivalent to 30 ns timing steps. Further, we measure the material-dependent ablation response to changing laser pulse repetition rates, identifying intervals where the material removal rate is linearly scalable with the repetition rate while preserving the intrinsic high-quality of ultra-short laser processing. The proof of concept is a single-step femtosecond laser processing of surfaces based on a depth-encoded image input.

• Jezik: Angleški jezik
• Ključne besede: femtosecond laser, laser microstructuring, pulse-on-demand, biomimetic surfaces, complex patterns
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 6 str.
• Številčenje: Vol. 61, art. 106099
• PID: 20.500.12556/RUL-167699
• UDK: 621.375.826
• ISSN pri članku: 2468-0230
• DOI: 10.1016/j.surfin.2025.106099
• COBISS.SI-ID: 228300035
• Datum objave v RUL: 07.03.2025

Gradivo je del revije

• Naslov: Surfaces and interfaces
• Založnik: Elsevier
• ISSN: 2468-0230
• COBISS.SI-ID: 526516249

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: femtosekundni laser, lasersko mikrostrukturiranje, pulz na zahtevo, biomimetične površine, kompleksni vzorci