Berlin 2012 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 31: Nanocharacterization

MM 31.7: Talk

Wednesday, March 28, 2012, 11:45–12:00, H 1029

Material Processing with Femtosecond Laser Pulses — •Steffen Fiedler, Robert Irsig, Anna Oniszczuk, Josef Tiggesbäumker, Conrad Schuster, Anna Svanidze, Neeke Rothe, Stefan Lochbrunner, and Karl-Heinz Meiwes-Broer — Institute of Physics, University of Rostock, Germany

Material modifications on the µm-scale are required in many applications, e. g. in micromechanics or modern medical implant technologies. Pulsed laser light sources are powerful tools dedicated to replace conventional methods of mechanical processing in many cases.

In laser machining the working area is confined to the laser focus with minimal effects on the functionality of the surrounding surface. Even higher precision becomes available for ultrashort femtosecond laser pulses by a reduction of heat transfer into the material due to the short interaction time [1]. Furthermore the high intensity of femtosecond laser pulses leads to a different ablation mechanism that in principle allows for processing arbitrary materials. In order to achieve this it is necessary to adapt the laser parameters for each sample. Especially when applying shaped laser pulses an improved precision is accessible [2].

The goal of this project is to optimize the working conditions and the quality of the machining process for different specimens and their implementation in medical applications in particular.

[1] B. N. Chichkov et al., Appl. Phys. A 63, 109 (1996)

[2] L. Englert et al., Appl. Phys. A 92, 749 (2008)