Simulation of ultrashort double pulse laser ablation of metals

被引：0

作者：

Povarnitsyn, M. ^{[1
]}

Khishchenko, K. ^{[1
]}

Levashov, P. ^{[1
]}

Zakharenkov, A. ^{[1
]}

Hermann, J. ^{[2
]}

De Falco, S. ^{[2
]}

Itina, T. ^{[3
]}

机构：

[1] RAS, Joint Inst High Temp, Moscow 125412, Russia

[2] CNRS, LP3, UMR6182, F-13288 Marseille 9, France

[3] CNRS, Lab Hubert Curien, UMR 5516, F-42000 St Etienne, France

来源：

JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS | 2010年 / 12卷 / 03期

关键词：

Laser ablation; Femtosecond; Double pulse; Hydrodynamic model;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We perform a hydrodynamic simulation of laser ablation of metals to explain the results of recent experiments with subpicosecond double pulses (2 x 2 J/cm(2)). In the experiments, the time delay tau(del) between the pulses varies from 0.1 ps to 200 ps. When the delay is much shorter than the electron-ion relaxation time tau(ei) (tau(delay) << tau(ei)) the crater depth is the same as for a single pulse of energy 4 J/cm(2). For the intermediate delays (tau(delay) similar to tau(ei)) the crater depth monotonically drops. For the long delay tau(delay) >> tau(ei) the crater depth corresponds to that obtained with a single pulse. The results of the hydrodynamic two-temperature simulations performed with realistic absorption and multiphase equation of state explain the observed behavior.

引用

页码：674 / 676

页数：3

共 7 条

[1] Determination of the transport and optical properties of a nonideal solid-density plasma produced by femtosecond laser pulses [J].