Strongly Coupled Magnon–Plasmon Polaritons in Graphene-Two-Dimensional Ferromagnet Heterostructures

• DOI: 10.1021/acs.nanolett.3c00907
• Publication Date: 2023-05-11T14:06:00Z
• Authors: A. T. Costa; Mikhail I. Vasile...; J. Fernández-Rossier; Nuno M. R. Peres
• Keywords: Magnon; Magnonics; Spin wave

Magnons and plasmons are different collective modes, involving the spin charge degrees of freedom, respectively. Formation hybrid plasmon-magnon polaritons in heterostructures plasmonic magnetic systems faces two challenges, small interaction electromagnetic field plasmon with spins, energy mismatch, as most have energies orders magnitude larger than those magnons. We show that graphene form magnons two-dimensional ferromagnetic insulators, placed up to half a micrometer apart, Rabi splittings range 100 GHz (dramatically cavity magnonics). This is facilitated both by cooperative super-radiant nature coupling afforded phase matching. can be modulated electrically mechanically, we propose resonance experiment implemented ferromagnet driven plasmons.