Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 87: Plasmonics and Nanooptics: Light-Matter Interaction, Spectroscopy I
O 87.6: Vortrag
Donnerstag, 20. März 2025, 16:15–16:30, H4
Surface-mediated ultra-strong cavity coupling of two-dimensional itinerant electrons — Christian Eckhardt1,2, Andrey Grankin3, Dante Kennes2,1, Michael Ruggenthaler1, Angel Rubio1, •Michael Sentef4,1, Mohammad Hafezi3, and Marios Michael1 — 1Max Planck Institute for the Structure and Dynamics of Matter, Hamburg — 2Institut für Theorie der Statistischen Physik, RWTH Aachen University — 3Joint Quantum Institute, Department of Physics, University of Maryland — 4Institute for Theoretical Physics, University of Bremen
Engineering phases of matter in cavities requires effective light-matter coupling strengths that are on the same order of magnitude as the bare system energetics, coined the ultra-strong coupling regime. For models of itinerant electron systems, which do not have discrete energy levels, a clear definition of this regime is outstanding to date. Here we argue that a change of the electronic mass exceeding 10% of its bare value may serve as such a definition. We propose a quantitative computational scheme for obtaining the electronic mass in relation to its bare vacuum value and show that coupling to surface polariton modes can induce such mass changes. Our results have important implications for cavity design principles that enable the engineering of electronic properties with quantum light.