Coulomb explosion in ultrashort pulsed laser ablation of Al2O3

被引：297

作者：

Stoian, R

Ashkenasi, D

Rosenfeld, A

Campbell, EEB

机构：

[1] Max Born Inst Nichtlineare Opt & Kurzzeitspektros, D-12489 Berlin, Germany

[2] Gothenburg Univ, Sch Phys & Engn Phys, S-41296 Gothenburg, Sweden

[3] Chalmers Univ Technol, S-41296 Gothenburg, Sweden

[4] Natl Inst Laser, Laser Dept, R-76900 Bucharest, Romania

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.62.13167

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Coulomb explosion (CE) is identified as the mechanism of ion ejection under low fluence ultrashort pulse laser ablation of crystalline Al2O3 The ion moments are equal during "gentle" ablation. This is explained by impulsive CE from the surface region lasting similar to1 ps. The onset of "strong" ablation leads to a decrease in the measured ion velocitics. The kinetic energies rather than the momenta of the ions become equal. This regime is associated with strong plasma light emission and crater formation.

引用

页码：13167 / 13173

页数：7

共 34 条

[1] Single and multiple ultrashort laser pulse ablation threshold of Al2O3 (corundum) at different etch phases [J].