The remarkable transformation of nanoripples in glass-metal nanocomposite
Source abstract
Abstract
We report the linear-to-circular transformation of high spatial frequency (HSF) ripples formed on the surface of a glass with embedded silver nanoparticles under irradiation with 120 fs long pulses at the wavelength of 800 nm. In the experiments, at the ablation threshold of 1.28 J/cm2, the HSF ripples with the period of ∼300 nm were oriented along the polarization of the laser beam. However, we found that the nanoripples pattern is gradually transforming from linear to an untypical circular one when the pulse energy increases. The ripples take nearly perfect circular shape at the pulse energy of ∼8.0 μJ, which corresponds to the fluence of 1.5 J/cm2.
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Research context
OpenAlex topics: Laser Material Processing Techniques · Ocular and Laser Science Research · Laser-induced spectroscopy and plasma
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Affiliations
Institute of Photonics, University of Eastern Finland 1 , Joensuu 80101, Finland
Photonics Finland Ry 2 , Joensuu 80110, Finland
Peter the Great St.-Petersburg Polytechnic University 3 , St.-Petersburg 195251, Russia
St. Petersburg Academic University 4 , St. Petersburg 194021, Russia
Funding
Pohjois-Karjalan Rahasto · Ministry of Education and Science of the Russian Federation · Horizon 2020 Framework Programme · Academy of Finland
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