Mengkun Liu

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...

Scalable, Simple, and Versatile Encapsulation of 2D Materials and Devices

Abstract Air-sensitive 2D materials present fundamental challenges for device integration. Encapsulation is required to preserve intrinsic properties, yet conventional strategies require complicated fabrication workflows and fail with thicker flakes. We demonstrate that electron-...

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...