Energy transport and material removal in wide bandgap materials by a femtosecond laser pulse

被引：121

作者：

Jiang, L ^{[1
]}

Tsai, HL ^{[1
]}

机构：

[1] Univ Missouri, Laser Based Mfg Lab, Dept Mech & Aerosp Engn, Rolla, MO 65409 USA

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2005年 / 48卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.ijheatmasstransfer.2004.09.016

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A new model is proposed which greatly improves the accuracy in predicting the ablation depth and, for the first time. can predict the flat-bottom crater shape for wide bandgap materials ablated by a femtosecond laser pulse. The model calculates the transient distributions of free electron density and free electron temperature. The quantum treatment is employed to account for the specific heat and the relaxation time for free electrons. The temporal and spatial dependent optical properties of the dense plasma are considered. The predicted threshold fluence and ablation depth for fused silica are in agreement with published experimental data. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：487 / 499

页数：13

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