Title

Modeling of Ultrashort Laser Pulse-Train Processing of Metal Thin Films

Abstract

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.

Department(s)

Mechanical and Aerospace Engineering

Keywords and Phrases

Pulse-Train; Thin Film Processing; Ultrashort Laser Pulses

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 Elsevier, All rights reserved.

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