Analyses of femtosecond laser ablation of Ti, Zr, Hf

D. Grojo (1) , J. Hermann (1) , S. Bruneau (1) , T. Itina (1)

1 LP3 - Laboratoire Lasers, Plasmas et Procédés photoniques

Femtosecond laser ablation of Ti, Zr and Hf has been investigated by means of in-situ plasma diagnostics. Fast plasma imaging with the aid of an intensified charged coupled device (ICCD) camera was used to characterise the plasma plume expansion on a nanosecond time scale. Time- and spaceresolved optical emission spectroscopy was employed to perform time-of-flight measurements of ions and neutral atoms. It is shown that two plasma components with different expansion velocities are generated by the ultra-short laser ablation process. The expansion behaviour of these two components has been analysed as a function of laser fluence and target material. The results are discussed in terms of mechanisms responsible for ultra-short laser ablation.

Domaines: Optique [physics.optics]; Mécanique statistique [cond-mat.stat-mech]; Optique / photonique

D. Grojo, J. Hermann, S. Bruneau, T. Itina. Analyses of femtosecond laser ablation of Ti, Zr, Hf. 2004, pp.433-442. ⟨hal-00110505⟩