Publications in Scientific Journals:

A. Ionin, S. Kudryashov, S. Makarov, A. Levchenko, A. Rudenko, I. Saraeva, D. Zayarny, C. Nathala, W. Husinsky:
"Nanoscale surface boiling in sub-threshold damage and above-threshold spallation of bulk aluminum and gold by single femtosecond laser pulses";
Laser Physics Letters, 13 (2016), 0256031 - 0256038.

English abstract:
The sub and near-threshold topographic signatures of the spallation of nanometer-thick
melt layers during single-shot femtosecond laser ablation of bulk aluminum and gold
were experimentally observed for the first time, using scanning electron microscopy with
high spatial resolution. The novel ablative nanofeatures-sub-threshold boiling nanopits,
the partially detached ultrathin solidified melt layer, and the lamellar surface structure
under the layer along the spallative crater border, as well as the foam-like nanostructure of
the crater bottom-indicate the boiling origin of the spallation threshold, rather than the
thermomechanical rupture of the molten surface layer in a propagating unloading wave. These
ablative surface nanofeatures were also revealed in trenches of single-shot, near-wavelength
normal interference ripples on the aluminum surface, indicating their spallative nature and
being promising for biosensing applications.

aluminum, gold, femtosecond laser ablation, spallation, boiling, plasmonics, biosensing

Created from the Publication Database of the Vienna University of Technology.