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O: Fachverband Oberflächenphysik
O 7: Plasmonics and Nanooptics I
O 7.1: Vortrag
Montag, 18. März 2024, 10:30–10:45, MA 043
Plasmonic Twistronics: Discovery of Plasmonic Skyrmion Bags — •Julian Schwab1, Alexander Neuhaus2, Pascal Dreher2, Shai Tsesses3, Anant Mantha1, Florian Mangold1, Bettina Frank1, Guy Bartal3, Frank-J. Meyer zu Heringdorf2, Timothy J. Davis1,2,4, and Harald Giessen1 — 14th Physics Institute, Research Center SCoPE, and Integrated Quantum Science and Technology Center, University of Stuttgart, Germany — 2Faculty of Physics and Center for Nanointegration, University of Duisburg-Essen, Germany — 3Andrew and Erna Viterbi Department of Electrical Engineering, Technion-Israel Institute of Technology, Israel — 4School of Physics, University of Melbourne, Australia
We explore the application of twistronics in plasmonic systems by superimposing two plasmonic skyrmion lattices to create a moiré skyrmion superlattice. We combine this concept with plasmonic topological excitations and demonstrate that the topology of moiré skyrmion lattices contains skyrmion bags as complex topological quasiparticles that so far have been demonstrated only in liquid crystals and chiral ferromagnets. The size of plasmonic skyrmion bags can be controlled by the twist angle and its center of rotation. The resulting electric field distribution of a skyrmion bag is derived numerically and verified experimentally using time-resolved two-photon photoemission electron vector microscopy (PEEM).
Keywords: Plasmonics; Twistronics; Topology; Skyrmion; Vector microscopy