Coulomb explosion in ultrashort pulsed laser ablation of Al2O3

Authors
Stoian, R Ashkenasi, D Rosenfeld, A Campbell, EEB
Citation
R. Stoian et al., Coulomb explosion in ultrashort pulsed laser ablation of Al2O3, PHYS REV B, 62(19), 2000, pp. 13167-13173
Citations number
34
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
62
Issue
19
Year of publication
2000
Pages
13167 - 13173
Database
ISI
SICI code
0163-1829(20001115)62:19<13167:CEIUPL>2.0.ZU;2-V
Abstract
Coulomb explosion (CE) is identified as the mechanism of ion ejection under low fluence ultrashort pulse laser ablation of crystalline Al2O3 The ion m oments are equal during "gentle" ablation. This is explained by impulsive C E from the surface region lasting similar to1 ps. The onset of "strong" abl ation leads to a decrease in the measured ion velocitics. The kinetic energ ies rather than the momenta of the ions become equal. This regime is associ ated with strong plasma light emission and crater formation.