Nonlinear changes in plasma and crater properties during laser ablation of Si

被引：25

作者：

Liu, HC ^{[1
]}

Mao, XL ^{[1
]}

Yoo, JH ^{[1
]}

Russo, RE ^{[1
]}

机构：

[1] Lawrence Berkeley Lab, Berkeley, CA 94720 USA

来源：

APPLIED PHYSICS LETTERS | 1999年 / 75卷 / 09期

关键词：

D O I：

10.1063/1.124646

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A dramatic change in plasma characteristics, as well as a significant increase in the quantity of ablated mass were observed at a laser power density threshold of 20 GW/cm(2). The electron number density and temperature of the laser-induced plasma show dramatic changes in their nonlinear behavior in the range of 2-80 GW/cm(2). The crater volume undergoes some type of phase explosion at the threshold. Mechanisms such as inverse bremsstrahlung and self-regulation were used to describe the behavior below threshold. Self-focusing and critical temperature are discussed to explain the dramatic changes at the threshold. (C) 1999 American Institute of Physics. [S0003-6951(99)02935-6].

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收藏

页码：1216 / 1218

页数：3

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