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O: Fachverband Oberflächenphysik

O 80: Plasmonics and Nanooptics IV: Light-Matter Interaction and Spectroscopy III

O 80.3: Topical Talk

Donnerstag, 30. März 2023, 15:30–16:00, CHE 89

Topological Plasmonics and Plasmonic Twistronics: Skyrmions, Merons, Quasicrystals, and Sykrmion Bags — •Harald Giessen¹, Bettina Frank¹, Pascal Dreher², David Janoschka², Frank Meyer zu Heringdorf², Julian Schwab¹, Tim Davis^1,4, Kobi Cohen³, Shai Tsesses³, and Guy Bartal³ — ¹4. Physikalisches Institut, Universität Stuttgart, Germany — ²CENIDE, University of Duisburg-Essen, Germany — ³Technion, Haifa, Israel — ⁴University of Melbourne, Australia

We present ultrafast vectorial electric field measurements of plasmonic skyrmions, merons, quasicrystalline structures, and skyrmion bags. 10 nm spatial resolution, sub-fs temporal resolution, and vectorial properties of the surface plasmon field on single crystalline, atomically flat gold surfaces are presented. Our techniques combine ultrafast vector PEEM and interferometric s-SNOM. Our tailored model systems reveal a rich set of topological phenomena, reaching even into 4-dimensional topology.