Abstract
The manipulation of the subpulse number, pulse delay, and pulse energy distribution of an
ultrafast laser enables electron dynamics control by changing absorptions, excitations, ionizations,
and recombinations of electrons, which can result in smaller, cleaner, and more controllable
structures. This letter experimentally reveals that ablation sizes and recasts can be controlled by
shaping femtosecond pulse trains to adjust transient localized electron dynamics, material
properties, and corresponding phase change mechanisms.
© 2013 Chinese Optics Letters
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