Direct observation of enhanced residual thermal energy coupling to solids in femtosecond laser ablation

被引:109
作者
Vorobyev, AY [1 ]
Guo, CL [1 ]
机构
[1] Univ Rochester, Inst Opt, Rochester, NY 14627 USA
基金
美国国家科学基金会;
关键词
D O I
10.1063/1.1844598
中图分类号
O59 [应用物理学];
学科分类号
摘要
We perform direct measurement of the thermal energy remaining in the bulk of Cu, Mg, Au, and Si samples following multi-pulse femtosecond laser ablation. In contrast to the previous belief that the thermal energy remaining in the ablated sample is negligible using femtosecond pulses, we show a significant amount of residual thermal energy deposited in various materials. In fact, with a sufficiently large number of pulses at high fluence, virtually all the incident laser energy can be retained in the sample. Several possible mechanisms are investigated for their role in residual heating, including laser-induced surface modification, exothermic chemical processes, and pressure effects. (C) 2005 American Institute of Physics.
引用
收藏
页码:011916 / 1
页数:3
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