Dresden 2026 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 27: Plasmonics and nanooptics: Light-matter interaction, spectroscopy – Poster

O 27.7: Poster

Montag, 9. März 2026, 18:00–20:00, P2

Optical Response of Noble Metals based on Metal Boltzmann-Bloch Equations — •Robert Lemke, Andreas Knorr, and Jonas Grumm — Institut für Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universität Berlin, Berlin, Germany

The optical response of plasmonic noble metals can be attributed to the interplay of electronic intra- and interband processes. These processes are addressed by coupled metal Boltzmann-Bloch equations derived from microscopic many-body theory. The specific properties of noble metals are caused by an anisotropic band structure in the vicinities of the X and L high symmetry points.

In order to analyse the line broadening of intra- and interband excitations we consider linearised electron-phonon and electron-electron scattering. Our approach allows to connect spectroscopic signatures directly to microscopic processes, not possible with phenomenological Drude-Lorentz models.

Keywords: Intra-/Interband Processes; Anisotropic Band Structure; Fermi Surface; Plasmonics