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O: Fachverband Oberflächenphysik

O 92: Poster Session - Ultrafast Electron Dynamics at Surface and Interfaces II

O 92.2: Poster

Mittwoch, 18. März 2020, 18:15–20:00, P2/1OG

Describing the electronic nonequilibrium after ultrashort laser excitation — •Markus Uehlein, Sebastian T. Weber, and Baerbel Rethfeld — Department of Physics and Research Center OPTIMAS, TU Kaiserslautern, Erwin-Schroedinger-Strasse 46, 67663 Kaiserslautern, Germany

Laser-matter interaction is an important topic in fundamental research for industrial applications. The energy of ultrashort laser pulses in the visible range is only absorbed by the electrons of the solid and then transferred to the phonons. For this dynamics multiple descriptions exist, ranging from phenomenological models to kinetic simulations. Here, we want to compare an extension of the TTM [1] by a nonthermal electron distribution and its interactions [2], with a complete kinetic description applying complete Boltzmann Collision Integrals [3]. Both descriptions are applied for various metals. Results as well as the range of applicability of the models will be compared.
[1] S. I. Anisimov et al., JETP 39, 375 (1974)
[2] E. Carpene, PRB 74, 024301 (2006)
[3] B. Y. Mueller and B. Rethfeld, PRB 87, 035139 (2013)