Dynamical studies on the generation of periodic surface structures by femtosecond laser pulses
1 Max-Born-Institut, Max-Born-Straße 2a, D-12489, Berlin, Germany,
2 BAM Bundesanstalt für Materialforschung und -prüfung, Unter den Eichen 87, D-12205, Berlin, Germany,
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The dynamics of the formation of laser-induced periodic surface structures (LIPSS) on fused silica upon irradiation with linearly polarized fs-laser pulses (50 fs pulse duration, 800 nm center wavelength) is studied experimentally using a double pulse experiment with cross polarized pulse sequences and a trans illumination femtosecond time-resolved (0.1 ps – 1 ns) pump-probe diffraction approach. The results in both experiments confirm the importance of the ultrafast energy deposition and the laser-induced free-electron plasma in the conduction band of the solids for the formation of LIPSS.
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