Engineering anisotropic electrodynamics at the graphene/CrSBr interface.

ABSTRACT: Graphene is a privileged 2D platform for hosting confined light-matter excitations known as surface plasmon polaritons (SPPs), as it possesses low intrinsic losses and a high degree of optical confinement. However, the isotropic nature of graphene limits its ability to guide and focus SPPs, making it less suitable than anisotropic elliptical and hyperbolic materials for polaritonic lensing and canalization. Here, we present graphene/CrSBr as an engineered 2D interface that hosts highly anisotropic SPP propagation across mid-infrared and terahertz energies. Using scanning tunneling microscopy, scattering-type scanning near-field optical microscopy, and first-principles calculations, we demonstrate mutual doping in excess of 10¹³cm^-2 holes/electrons between the interfa

SUBMITTER: Rizzo DJ 

PROVIDER: S-EPMC11845594 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature