N. Huber et al., Time-resolved photography of the plasma-plume and ejected particles in laser ablation of polytetrafluoroethylene, EUROPH LETT, 51(6), 2000, pp. 674-678
KrF-excimer laser ablation of sintered-powder PTFE targets is successfully
used for the deposition of high-quality thin films. The mechanism is based
on the high extinction of the pressed-ponder targets which causes more effi
cient dissipation of the incident laser-light energy. As a result, a strong
ly forward-directed jet of PTFE particles is generated. This jet is invest
igated by means of a gated ICCD-camera. While the expansion of the visible
plume starts with the laser pulse and lasts for about 10 mu s, the particle
jet can be observed within a time interval between about 5 mu s and more t
han 100 mu s after the laser guise.