Seminar Festkörper- und Grenzflächenphysik KOMET - experimentell
June 21, 2016 at 12:15 p.m. in Newton-Raum, Staudingerweg 9, 1. Stock, Raum 122 (Nebengebäude)Prof. Dr. Hans-Joachim Elmers
Institut für Physik, KOMET 5
elmers@uni-mainz.de
Prof. Dr. H. J. Elmers
The phenomenological two-temperature model [1] and its extensions [2] are the most common models to describe the evolution of the electronic and lattice sub-systems following photoexcitation with femtosecond optical pulses. Nevertheless, their validity is being continuously disputed. To test the model and its applicability we studied carrier dynamics in copper thin films. The dynamics of the optical constants in thin films have been measured in the visible range. We present an approach to determine the underlying changes in the electron distribution function. The approach enables quantitative analysis of the evolution of the electronic subsystem and provides excess to the electron-phonon coupling constant.
[1] P. B. Allen: Phys. Rev. Lett., 59, 1460 (1987).
[2] S. Dal Conte; et al: Science, 335, 1600 (2012).