Time-resolved photography of the plasma-plume and ejected particles in laser ablation of polytetrafluoroethylene

Citation
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
Citations number
10
Categorie Soggetti
Physics
Journal title
EUROPHYSICS LETTERS
ISSN journal
02955075 → ACNP
Volume
51
Issue
6
Year of publication
2000
Pages
674 - 678
Database
ISI
SICI code
0295-5075(200009)51:6<674:TPOTPA>2.0.ZU;2-C
Abstract
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.