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A unified thermal model of thermophysical effects with pulse width from nanosecond to femtosecond

Published online by Cambridge University Press:  30 April 2008

R. R. Fang ,
D. M. Zhang ,
H. Wei ,
D. Z. Hu ,
Z. H. Li ,
X. Y. Tan ,
M. Sun  and
F. X. Yang
R. R. Fang
Affiliation:
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
D. M. Zhang*
Affiliation:
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
H. Wei
Affiliation:
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071, P.R. China
D. Z. Hu
Affiliation:
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
Z. H. Li
Affiliation:
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
X. Y. Tan
Affiliation:
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
M. Sun
Affiliation:
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
F. X. Yang
Affiliation:
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
*
[email protected]
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Abstract

This paper presents a unified thermal model, which can describe thethermophysical effects with laser pulse width ranges from nanosecondto femtosecond. Take gold target as an example, the numericalsolutions are obtained from the unified model using a finitedifference method. The temperature distribution of the electron andthe lattice along with space and time at a certain laser fluence ispresented. The time-dependence of lattice and electron temperatureon the surface for different laser fluence is also performed. Thesatisfactory agreement between our numerical results andexperimental results of vaporization threshold indicates that theunified thermal model is correct and reasonable.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 42 , Issue 3 , June 2008 , pp. 229 - 234
Copyright
© EDP Sciences, 2008

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