Three dimensional transient behavior of thin films surface under pulsed laser excitation

Appl. Phys. Lett. 103, 114104 (2013);

V. Dimitriou, E. Kaselouris, Y. Orphanos, M. Bakarezos, N. Vainos, M. Tatarakis, N. A. Papadogiannis.

Centre for Plasma Physics & Lasers, Technological Educational Institute of Crete, Chania, 73133 and Rethymno 74100, Greece and

Department of Natural Resources & Environment, Technological Educational Institute of Crete, Chania 73133, Greece and

Department of Music Technology & Acoustics, Technological Educational Institute of Crete, Rethymnon 74100, Greece and

Department of Electronics, Technological Educational Institute of Crete, Chania 73133, Greece and

Department of Materials Science, University of Patras, Rio 26500, Greece.

 

Abstract

 

The three dimensional spatiotemporal response of thin metal films surfaces excited by nanosecond laser pulses is investigated in both the thermoelastic and the ablation regimes. An experimental laser whole-field interferometric technique allows for the direct monitoring of the dynamic deformation of a macroscopic area on the surface with ultrahigh lateral resolution. A specially developed three dimension finite element model simulates the laser-surface interaction, predicts the experimentally obtained results, and computes key parameters of matter’s thermomechanical response. This method provides a powerful instrument for spatiotemporal behavior of thin-film surfaces under extreme conditions demanded for innovative applications.

© 2013 AIP Publishing LLC

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This research has been co-financed by the European Union (European Social Fund – ESF) and Greek national funds through the Operational Program “Education and Lifelong Learning” of the National Strategic Reference Framework (NSRF) – Research Funding Program: ARCHIMEDES III. Investing in knowledge society through the European Social Fund (Action 19: “Innovative optoacoustic device for 3d spatiotemporal microcharacterization of composite materials based on ultrafast laser pulses”).

Figure Caption: Comparison of simulated (left) and experimentally measured (right) laser generated spatial deformations of Au thin film surface, in the melting regime, 17 ns after excitation by a 6 ns laser pulse.

 

Three dimensional transient behavior of thin films surface under pulsed laser excitation

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