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Laser Induced Plasma from Solid and Thin Films : Comparative Study

The evolution features of lithium plasma generated by two different schemes viz. the laser-blow-off (LBO) of multicomponent LiF-C thin film and conventional laser ablation referred to here as laser produced plasma (LPP) from solid lithium have been studied using fast imaging and optical emission spectroscopic techniques. Modifications of the plume structure in different experimental conditions are monitored as a function of ambient gas pressure and distance from the target. Apart from their similarities, some interesting differences are noticed in temporal profiles of the plumes generated by LPP and LBO both in vacuum as well as in the presence of the ambient gas.