Journal Home Online First Current Issue Archive For Authors Journal Information 中文版

2012, Volume 6, Issue 1

Abstract

Keywords

Related Research

Back to Top

Frontiers in Energy >> 2012, Volume 6, Issue 1 doi: 10.1007/s11708-012-0179-9

Ultrafast solid-liquid-vapor phase change of a thin gold film irradiated by femtosecond laser pulses and pulse trains

1. Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia MO 65211, USA; 2. College of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Available online: 2012-03-05
HTML15 PDF 1 Collect 0

Next Previous

Abstract

Effects of different parameters on the melting, vaporization and resolidification processes of thin gold film irradiated by femtosecond pulses and pulse train were systematically studied. The classical two-temperature model was adopted to depict the non-equilibrium heat transfer in electrons and lattice. The melting and resolidification processes, which was characterized by the solid-liquid interfacial velocity, as well as elevated melting temperature and depressed solidification temperature, was obtained by considering the interfacial energy balance and nucleation dynamics. Vaporization process which leads to ablation was described by tracking the location of liquid-vapor interface with an iterative procedure based on energy balance and gas kinetics law. The parameters in discussion included film thickness, laser fluence, pulse duration, pulse number, repetition rate, pulse train number, etc. Their effects on the maximum lattice temperature, melting depth and ablation depth were discussed based on the simulation results.

Related Research