Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet : A comparative study

A. Semerok (1) , Christophe Dutouquet (2)

1 SEARS - Service d'études analytiques et de réactivité des surfaces
2 INERIS - Institut National de l'Environnement Industriel et des Risques

Ultrashort pulse laser microablation coupled with optical emission spectroscopy was under study to obtain several micro-LIBS analytical features (shot-to-shot reproducibility, spectral line intensity and lifetime, calibration curves, detection limits). Laser microablation of Al matrix samples with known Cu- and Mg-concentrations was performed by single and double pulses of 50 fs and 1 ps pulse duration in air and with Ar-jet. The micro-LIBS analytical features obtained under different experimental conditions were characterized and compared. The highest shot-to-shot reproducibility and gain in plasma spectral line intensity were obtained with double pulses with Ar-jet for both 50 fs and 1 ps pulse durations. The best calibration curves were obtained with 1 ps pulse duration with Ar-jet. Micro-LIES with ultrashort double pulses may find its effective application for surface elemental microcartography.

Keywords: LIBS; FEMTOSECOND ABLATION; DOUBLE PULSE; MICROANALYZE

Domains: Environmental Sciences

A. Semerok, Christophe Dutouquet. Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet : A comparative study. Spectrochimica Acta Part B: Atomic Spectroscopy, 2014, 99, pp.163-171. ⟨10.1016/j.sab.2014.06.022⟩. ⟨ineris-01862453⟩