Emission of ions and charged clusters due to impulsive Coulomb explosion in ultrafast laser ablation of graphite

被引：17

作者：

Kaplan, A. ^{[1
]}

Lenner, M. ^{[1
]}

Palmer, R. E. ^{[1
]}

机构：

[1] Univ Birmingham, Sch Phys & Astron, Nanoscale Phys Res Lab, Birmingham B15 2TT, W Midlands, England

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevB.76.073401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dynamics of ultrafast laser ablation of graphite have been investigated by femtosecond time resolved autocorrelation measurements at 800 nm. The results indicate that multiply charged atomic ions and ionized carbon clusters are repelled by a transient electric field developed on the surface during the laser pulse, the process known as impulsive Coulomb explosion. From time resolved measurements, we estimate that the decay time constant of the surface field is 125 +/- 10 fs.

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页数：4

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