Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 105, Issue 1, Pages 125-129Publisher
SPRINGER
DOI: 10.1007/s00339-011-6579-6
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Funding
- National Natural Science Foundation of China [61078009, 10874121]
- National Basic Research Program 973 of China [2011CB808101]
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In this paper, a 3D two-temperature model is introduced to investigate femtosecond ablation on aluminum film. 3D temperature evolutions for both electrons and lattice are obtained, which present us a vivid view of the energy transformation process during femtosecond ablation. Simulated 3D ablation craters irradiated by a single pulse with different energy are acquired, from which we can easily and precisely predict crater depth and radius before ablation takes place. In the experiment we measure the radii of the craters ablated by pulses with different energy and numbers delivered from a chirped pulse amplification Ti: sapphire system. The threshold fluence for both single and multi pulses are obtained. Comparisons are made between results of the experiment and relative simulated calculations show the reliability of our proposed calculation model.
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