Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 66: Plasmonics and nanooptics: Applications and other aspects II
O 66.10: Vortrag
Mittwoch, 14. März 2018, 17:30–17:45, MA 041
Influence of surface plasmons on energy dissipation in laser-excited materials — •Pavel N. Terekhin1,2, Sebastian T. Weber1, and Baerbel Rethfeld1 — 1Department of Physics and Research Center Optimas, University of Kaiserslautern, Erwin-Schroedinger-Strasse 46, 67663 Kaiserslautern, Germany — 2National Research Centre "Kurchatov Institute", Kurchatov Sq. 1, 123182 Moscow, Russia
In our work we simulate the excitation and decay of surface plasmons during and after ultra-short laser irradiation. In our sample system, surface plasmons can be created in two different ways: at an interface between an absorbing metal and a dielectric coating as well as at edges and defects of a metal surface.
We want to take into account the field enhancement of the electrical field resulting from the surface plasmons. Then, we extend the two-temperature model (TTM) to describe the interaction of hot electrons with an additional plasmon subsystem. The aim is to obtain the time evolution of the energy transfer between plasmons, electrons and the crystal lattice. Our approach will shed light on the fundamental mechanisms of the materials' excitation, and, additionally, it will give promising perspectives for the technological controlling of the nanostructuring of material surfaces.