Dynamics of femtosecond laser induced ablation from solid surfaces

被引：49

作者：

Sokolowski-Tinten, K ^{[1
]}

Bialkowski, J ^{[1
]}

Cavalleri, A ^{[1
]}

Boing, M ^{[1
]}

Schuler, H ^{[1
]}

von der Linde, D ^{[1
]}

机构：

[1] Univ Essen Gesamthsch, Inst Laser & Plasmaphys, D-45117 Essen, Germany

来源：

HIGH-POWER LASER ABLATION, PTS 1-2 | 1998年 / 3343卷

关键词：

ablation; ultrashort laser pulses; time-resolved microscopy;

D O I：

10.1117/12.321593

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Femtosecond laser induced ablation from solid surfaces has been investigated by means of time resolved microscopy. On transparent materials ablation is initiated by dielectric breakdown and formation of a dense and hot surface plasma. Measurements of the plasma threshold yield values of a few times 10(13) W/cm(2) with little variation among different materials. This indicates that microscopic surface properties are responsible for surface breakdown. On absorbing semiconductors and metals near-threshold ablation is brought about by hydrodynamic expansion of the lasergenerated hot and pressurized matter. Upon expansion into vacuum initially metallic materials transform into a transparent state with a high refractive index. The observed behavior is related to general properties of matter in the liquid-gas coexistence regime.

引用

页码：46 / 57

页数：12