Observation of naturally canalized phonon polaritons in LiV₂O₅ thin layers.

ABSTRACT: Polariton canalization is characterized by intrinsic collimation of energy flow along a single crystalline axis. This optical phenomenon has been experimentally demonstrated at the nanoscale by stacking and twisting van der Waals (vdW) layers of α-MoO₃, by combining α-MoO₃ and graphene, or by fabricating an h-BN metasurface. However, these material platforms have significant drawbacks, such as complex fabrication and high optical losses in the case of metasurfaces. Ideally, it would be possible to canalize polaritons "naturally" in a single pristine layer. Here, we theoretically predict and experimentally demonstrate naturally canalized phonon polaritons (PhPs) in a single thin layer of the vdW crystal LiV₂O₅. In addition to canalization, PhPs in

SUBMITTER: F Tresguerres-Mata AI 

PROVIDER: S-EPMC10973474 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature