Abstract
We present the first-principle numerical study of nonlinear decay of a femtosecond laser pulse into a pair of surface plasmon polaritons (SPP) during reflection from a rough metallic surface. The ultrafast dynamics of the decay was studied at damaging laser fluences of about 1 J/cm2, and the principal role of the electronic collision rate growth was proved. The resulting strongly inhomogeneous heating of metal is an important stage of laser-induced phenomena like ablation, terahertz radiation generation, and periodic surface structures formation.
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Data availability
The source code of the program used for numerical modeling is available on GitHub [18]. Other data are available upon reasonable request from the authors.
18. V. A. Mironov, I. V. Oladyshkin, E. V. Suvorov, et al., J. Exp. Theor. Phys. 119, 179 (2014).
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