Plasmonic and Hydrodynamic Effects in Ultrafast Laser-Induced Periodic Surface Structures on Metals

Jean-Philippe Colombier 1 Florence Garrelie 1 Philippe Brunet 2 Aurélie Bruyère 1 Florent Pigeon 1 Razvan Stoian 1 Olivier Parriaux 1
1 LHC - Laboratoire Hubert Curien [Saint Etienne]
2 MSC - Matière et Systèmes Complexes
Abstract : We report results on the development of laser-induced periodic surface structures produced by ultrashort laser pulses irradiating metallic surfaces. The surface topology features are discussed in terms of periodicity and amplitude contrast of the pattern formation, and in relation to the chrono-logical sequence of laser-induced events. Resonant excitation of Surface Plasmons in metallic grat-ings show that the surface wave excited during the femtosecond laser pulse can initiate the observed patterning. Metallic behavior under nonequilibrium conditions on the picosecond timescale is then investigated to correlate the amount of material experiencing solid-to-liquid transitions and the sub-sequent structure amplitude. With the derived observation, the calculation of the transient nonequi-librium thermodynamic characteristics of excited nickel is performed, allowing to define character-istic timescales of thermocapillary processes which may occur under multi-pulse irradiation.
Keywords : Ultrafast LIPSS formation ripples on metal surface femtosecond laser irradiation surface plasmon excitation thermocapillary effect Marangoni effect Sipe model efficacy factor
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Article dans une revue
Journal of Laser Micro/NanoEngineering, 2012, 7 (3), pp.362-368. 〈10.2961/jlmn/2012.03.0023〉
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UNIV-ST-ETIENNE | LAHC | USPC | IOGS | PARISTECH

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Jean-Philippe Colombier, Florence Garrelie, Philippe Brunet, Aurélie Bruyère, Florent Pigeon, et al.. Plasmonic and Hydrodynamic Effects in Ultrafast Laser-Induced Periodic Surface Structures on Metals. Journal of Laser Micro/NanoEngineering, 2012, 7 (3), pp.362-368. 〈10.2961/jlmn/2012.03.0023〉. 〈ujm-00751462〉

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