Time-resolved spatial distribution of plasma in the ablation of a Ba0.6Sr0.4TiO3 target by 25 ns KrF ultraviolet laser

Jean-François Lagrange (1) , Jörg Hermann (2) , Jérôme Wolfman (1) , Olivier Motret (1)

1 GREMAN - UMR 7347 - GREMAN (matériaux, microélectronique, acoustique et nanotechnologies)
2 LP3 - Laboratoire Lasers, Plasmas et Procédés photoniques

We performed radially and longitudinally time-resolved plasma analysis during pulsed laser deposition of Ba0.6Sr0.4TiO3 thin films. The plasma is shown to be optically thick and strongly non-uniform during the early expansion phase and the resonance line Ba II (455.4 nm) is strongly self-reversed during this time. Plasma temperature and electron density were obtained by comparing experimental emission spectra with the spectral radiance computed for a non-uniform plasma in local thermal equilibrium. (C) 2014 AIP Publishing LLC.

Mots clés: Plasma expansion; Ionospheric dynamics; Surface collisions; Plasma applications; Materials; Condensed matter properties; Laser applications; Ionospheric physics; Thin film deposition; Thin films

Domaines: Optique / photonique

Jean-François Lagrange, Jörg Hermann, Jérôme Wolfman, Olivier Motret. Time-resolved spatial distribution of plasma in the ablation of a Ba0.6Sr0.4TiO3 target by 25 ns KrF ultraviolet laser. Journal of Applied Physics, 2014, 116 (13), ⟨10.1063/1.4897223⟩. ⟨hal-01418548⟩