Tunable anisotropic van der Waals films of 2M-WS₂ for plasmon canalization.

ABSTRACT: In-plane anisotropic van der Waals materials have emerged as a natural platform for anisotropic polaritons. Extreme anisotropic polaritons with in-situ broadband tunability are of great significance for on-chip photonics, yet their application remains challenging. In this work, we experimentally characterize through Fourier transform infrared spectroscopy measurements a van der Waals plasmonic material, 2M-WS₂, capable of supporting intrinsic room-temperature in-plane anisotropic plasmons in the far and mid-infrared regimes. In contrast to the recently revealed natural hyperbolic plasmons in other anisotropic materials, 2M-WS₂ supports canalized plasmons with flat isofrequency contours in the frequency range of ~ 3000-5000 cm^-1. Furthermore, the anisotropic

SUBMITTER: Xing Q 

PROVIDER: S-EPMC10960863 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature