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Applied Physics A

, Volume 110, Issue 1, pp 227–233 | Cite as

Time-resolved study of back side ablated molybdenum thin films by ultrashort laser pulses

  • Dominik BartlEmail author
  • Andreas Michalowski
  • Margit Hafner
  • Andreas Letsch
  • Stefan Nolte
  • Andreas Tünnermann
Article

Abstract

Ultrashort laser pulses are used to ablate a thin molybdenum layer from glass by irradiating the metal film through the transparent substrate. The trajectories of ablated molybdenum fragments are recorded using a shadowgraphic setup with a time resolution in the nanosecond range. In addition, the shape of collected molybdenum fragments is examined as a function of applied fluence. It is confirmed that in a fluence regime close to the ablation threshold one single disc is ablated as a whole and its velocity is determined in the order of 50 ms−1. In a second fluence regime, partial melting at the center of the disc is found and small melt droplets are recorded on their flight. Mo fragments ablated in this regime feature a ring-like structure with a brittle fracture at the outer and a molten appearance at the inner edge.

Keywords

Ultrashort Laser Pulse Soda Lime Glass Threshold Fluence ICCD Camera Soda Lime Glass Substrate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

We acknowledge financial support by the German Federal Ministry of Education and Research (BMBF) under contract Nos. 13N11783 and 13N11788 (“Tailored for next PV, T4nPV”).

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Dominik Bartl
    • 1
    Email author
  • Andreas Michalowski
    • 1
  • Margit Hafner
    • 2
  • Andreas Letsch
    • 1
  • Stefan Nolte
    • 3
  • Andreas Tünnermann
    • 3
  1. 1.Robert Bosch GmbHStuttgartGermany
  2. 2.Institut für StrahlwerkzeugeUniversity StuttgartStuttgartGermany
  3. 3.Institute of Applied PhysicsFriedrich-Schiller-UniversityJenaGermany

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