Thermal behavior of thin metal films irradiated by shaped femtosecond pulse sequences laser

被引：26

作者：

Chen, A. M. ^{[1
]}

Jiang, Y. F. ^{[1
]}

Sui, L. Z. ^{[1
]}

Ding, D. J. ^{[1
]}

Liu, H. ^{[1
]}

Jin, M. X. ^{[1
]}

机构：

[1] Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2011年 / 284卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Shaped pulse laser; Two-temperature model; Laser ablation; THERMOELASTIC WAVE; ABLATION; RELAXATION;

D O I：

10.1016/j.optcom.2010.12.089

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A numerical solution of the two-temperature model has been performed up to the shaped femtosecond pulse sequences heated metal target. The two-temperature model is used to analyze the shaped femtosecond pulse sequences with the following major conclusions. We confirm the distinctly different results on the different shaped femtosecond pulse sequences. As the number of shaped femtosecond pulses increases, the nonequilibrium state between electrons and phonons gradually disappears, the highest transient electron temperature is lowered and the thermolization time is prolonged, the electron heat conductivity remains higher because of the effect of incubation on the electron temperature, which preserves the advantages of ultrashort lasers. The shaped femtosecond pulse sequences can increase the efficiency in ablation and micromachining. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：2192 / 2197

页数：6

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