Dynamics of femtosecond-laser-induced ablation from solid surfaces

Klaus Sokolowski-Tinten; Joerg Bialkowski; Andrea Cavalleri; Martin Boing; Harald Schueler; Dietrich von der Linde

doi:10.1117/12.321593

14 September 1998 Dynamics of femtosecond-laser-induced ablation from solid surfaces

Klaus Sokolowski-Tinten, Joerg Bialkowski, Andrea Cavalleri, Martin Boing, Harald Schueler, Dietrich von der Linde

Proceedings Volume 3343, High-Power Laser Ablation; (1998) https://doi.org/10.1117/12.321593
Event: High-Power Laser Ablation, 1998, Santa Fe, NM, United States

Abstract

Femtosecond laser induced ablation from solid surfaces has been investigated by means of time resolved microscopy. On transparent materials ablation is initiated by dielectric breakdown and formation of a dense and hot surface plasma. Measurements of the plasma threshold yield values of a few times 10¹³ W/cm² with little variation among different materials. This indicates that microscopic surface properties are responsible for surface breakdown. On absorbing semiconductors and metals near-threshold ablation is brought about by hydrodynamic expansion of the laser generated hot and pressurized matter. Upon expansion into vacuum initially metallic materials transform into a transparent state with a high refractive index. The observed behavior is related to general properties of matter in the liquid-gas coexistence regime.

Citation Download Citation

Klaus Sokolowski-Tinten, Joerg Bialkowski, Andrea Cavalleri, Martin Boing, Harald Schueler, and Dietrich von der Linde "Dynamics of femtosecond-laser-induced ablation from solid surfaces", Proc. SPIE 3343, High-Power Laser Ablation, (14 September 1998); https://doi.org/10.1117/12.321593

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