Optically driven plasmons in graphene/hBN van der Waals heterostructures: simulating s-SNOM measurements.

ABSTRACT: Converting transverse photons into longitudinal two-dimensional plasmon--polaritons (2D-PP) and vice versa presents a significant challenge within the fields of photonics and plasmonics. Therefore, understanding the mechanism which increases the photon - 2D-PP conversion efficiency could significantly contribute to those efforts. In this study, we theoretically examine how efficiently incident radiation, when scattered by a silver spherical nanoparticle (Ag-NP), can be transformed into 2D-PP within van der Waals (vdW) heterostructures composed of hexagonal boron nitride and graphene (hBN/Gr composites). We show that the Dirac plasmon (DP) excitation efficiency depends on the Ag-NP radius as R ³, and decreases exponentially with Ag-NP height h, so that for a certain

SUBMITTER: Golenic N 

PROVIDER: S-EPMC11502017 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature