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Tailoring the surface morphology of Ni at the nanometric scale by ultrashort laser pulses

Abstract : Ultrafast-laser irradiated surfaces are self-organizing systems that form intricated micropatterns and nanopatterns. Different shapes of randomly and periodically dispersed nanostructures emerge from a homogenous metal surface, resulting in a remarkable display of dissipative structures. Under femtosecond laser irradiation with a controlled amount of energy, the formation of nanobreath-figure, nanocrosshatch, nanopeaks, nanohumps, nanobumps, nanocavities and nanolabyrinthine patterns are reported. The fabrication of these 2D different nanostructures may allow for novel surface functionalizations aimed at controlling mechanical, biological, optical, or chemical surface characteristics on a nanometric scale. We demonstrate that using crossed-polarized double laser pulses adds a new dimension to the nanostructuring process since the laser energy dose and multi-pulse feedback modify the energy gradient distribution, crossing key levels for surface self-organization regimes.
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https://hal-ujm.archives-ouvertes.fr/ujm-03823707
Contributor : Jean-Philippe Colombier Connect in order to contact the contributor
Submitted on : Monday, October 24, 2022 - 8:55:01 AM
Last modification on : Wednesday, October 26, 2022 - 3:06:50 AM

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Anthony Nakhoul, Claire Maurice, Nicolas Faure, Florence Garrelie, Florent Pigeon, et al.. Tailoring the surface morphology of Ni at the nanometric scale by ultrashort laser pulses. Applied physics. A, Materials science & processing, 2022, 128, ⟨10.1007/s00339-022-06046-2⟩. ⟨ujm-03823707⟩

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