Modeling of Ultrashort Laser Pulse-Train Processing of Metal Thin Films
The improved two-temperature model with quantum treatments is used to analyze the ultrashort laser pulse-train processing of gold thin films. This study demonstrates that (1) as compared to "normal" laser heating, pulse-train technology can increase the photon efficiency, i.e., less total laser energy is required to achieve the same lattice temperature or phase change; (2) the number of bursts required for melting decreases with the repetition rate, but at tens of MHz or higher, the repetition rate has a negligible effect; (3) the lattice temperature at the thermolization time first increases to a peak and then decreases as the pulse separation time increases. © 2007 Elsevier Ltd. All rights reserved.
L. Jiang and H. Tsai, "Modeling of Ultrashort Laser Pulse-Train Processing of Metal Thin Films," International Journal of Heat and Mass Transfer, Elsevier, Jan 2007.
The definitive version is available at http://dx.doi.org/10.1016/j.ijheatmasstransfer.2007.01.049
Mechanical and Aerospace Engineering
Keywords and Phrases
Pulse-Train; Thin Film Processing; Ultrashort Laser Pulses
Article - Journal
© 2007 Elsevier, All rights reserved.