Lukas Wehmeier

Broadband Near-Field Imaging of Strong Polariton Coupling in Graphene/CrI3 Heterostructures

Abstract Interfacial charge transfer in van der Waals heterostructures provides a powerful, contact-free mechanism to activate two-dimensional plasmons. Chromium iodide (CrI3), a layered ferromagnetic insulator, induces significant doping in adjacent graphene, yet its nanoscale p...

Magnetic-field-tunable cyclotron hyperbolic polaritons

Hyperbolic polaritons are conventionally associated with structural anisotropy or phononic Reststrahlen bands. Here, we predict a class of hyperbolic polaritons arising from magnetic-field-induced cyclotron motion of charge carriers. When a perpendicular magnetic field is applied...