Axisymmetric modeling of femtosecond-pulse laser heating on metal films

被引：54

作者：

Chen, JK ^{[1
]}

Latham, WP ^{[1
]}

Beraun, JE ^{[1
]}

机构：

[1] AFRL, DELE, Laser Effects Res Branch, Directed Energy Directorate, Kirtland AFB, NM 87117 USA

来源：

NUMERICAL HEAT TRANSFER PART B-FUNDAMENTALS | 2002年 / 42卷 / 01期

关键词：

D O I：

10.1080/10407790190053806

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An axisymmetric, dual-hyperbolic, two-temperature model is del-eloped to investigate the thermal response of ultrashort laser pulse interaction with a metal film. The absorbed laser energy is treated as a volumetric heat source, which includes the effect of the ballistic motion of the excited electrons into deeper parts of the material. The temperature-dependent thermophysical properties are incorporated to fully describe the thermal transport in electrons and the lattice. A fourth-order finite-difference algorithm is employed to solve the coupled nonlinear heat conduction equations. Both the electron and lattice temperatures in a gold film irradiated by Gaussian laser beams are computed and presented along the r and z axes, respectively. In addition, the suitability of using a one-dimensional, two-temperature model for predicting the damage threshold fluence is examined.

引用

页码：1 / 17

页数：17

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