Научная статья на тему 'Three-Step Description of Single-Pulse Formation of LaserInduced Periodic Surface Structures on Metals'

Three-Step Description of Single-Pulse Formation of LaserInduced Periodic Surface Structures on Metals Текст научной статьи по специальности «Науки о Земле и смежные экологические науки»

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Текст научной работы на тему «Three-Step Description of Single-Pulse Formation of LaserInduced Periodic Surface Structures on Metals»

LM-I-38

Three-Step Description of Single-Pulse Formation of Laser-Induced Periodic Surface Structures on Metals

Y. Levy1, E. L. Gurevich2, and N. M. Bulgakova1

1- HiLASE Centre, Institute of Physics of the Czech Academy of Sciences, Dolni Brezany, Czech Republic

2- University of Applied Sciences Münster, Laser Center (LFM), Steinfurt, Germany

levy@fzu.cz

We presents a 3-step scenario of the formation of laser-induced periodic surface structures (LIPSS) on metals [1], upon irradiation by a single ultrashort laser pulse. In this model of LIPSS formation, the first step consists in the emergence of modulations in the electronic temperature at the surface due to the interference between the incident pulse and surface waves [2,3]. The second step corresponds to the thermal response of the system to that perturbation and the third step is the material relocation, that leads to the deformation of the target surface.

We focus mainly on the second step by studying the evolution of a temperature modulation on surfaces of different metals in the frame of the two-temperature model. We have used both a simplified analytical approach and 2D numerical simulations to that aim. The evolution of the amplitude of the temperature modulations and its growth rate are reported and the dynamics reveals that the spatial periods can be strongly suppressed depending, in particular, on the coupling factor and the in-depth heat diffusion. We compare the cases of 3 metals (Au, Al and Mo) with different thermophysical properties thus exhibiting different behaviors with respect to the spatial period.

[1] E. L. Gurevich, Y. Levy, N. M. Bulgakova, Three-Step Description of Single-Pulse Formation of Laser-Induced Periodic Surface Structures on Metals, Nanomaterials, 10, p. 1836 (2020).

[2] J. E. Sipe, J. F. Young, J. S. Preston, H. M. van Driel, Laser-induced periodic surface structure. I. Theory, Physical Review B, 27, pp. 1141-1154 (1983).

[3] P. Terekhin, O. Benhayoun, S. Weber, D. Ivanov, M. Garcia, B. Rethfeld, Influence of surface plasmon polaritons on laser energy absorption and structuring of surfaces, Applied Surface Science 512, p. 144420 (2020).

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