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O: Fachverband Oberflächenphysik

O 57: Plasmonics and nanooptics: Light-matter interaction, spectroscopy II

O 57.1: Hauptvortrag

Mittwoch, 11. März 2026, 10:30–11:00, HSZ/0403

From Plasmonic Near-Fields to Electron Dynamics - A Photoemission Perspective — •Pascal Dreher — Faculty of Physics and Center for Nanointegration, Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47048 Duisburg, Germany — Present Address: Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg

Electromagnetic near-fields are ubiquitous in solid-state physics. At surfaces, interfaces, and in nanostructures they control dynamical processes and shape optical and electronic material properties. By concentrating electromagnetic energy to subwavelength volumes, near-fields enable tailored nanoscale light-matter interactions relevant to plasmonics, nanophotonics, and ultrafast carrier dynamics. A detailed understanding of these interactions, however, requires experimental access to the full three-dimensional, time-dependent vectorial structure of near-fields, ideally in conjunction with direct probes of the electronic excitations they launch.

In this talk, I will address these needs using two complementary experimental approaches: polarimetric photoemission microscopy that maps vectorial near-fields at surfaces, and time- and angle-resolved photoemission that probes the resulting charge-carrier dynamics. Using surface plasmon polaritons as a prototypical platform, it will be demonstrated how these methods allow to relate near-field dynamics and light-matter interactions at the native length, momentum, time, and energy scales.

Keywords: Photoemission; PEEM; Surface Plasmon Polaritons; Light-Matter Interactions; Ultrafast Electron Dynamics