A comprehensive study of plasmonic mode hybridization in gold nanoparticle-over-mirror (NPoM) arrays.

ABSTRACT: Hybrid plasmonic systems that combine localized and propagative surface plasmons offer new opportunities for tunable light-matter interactions at the nanoscale. This paper provides the most comprehensive study to date of hybridization between gap localized surface plasmons (gap LSP) and diffraction-mediated propagative surface plasmon polaritons (SPP) in arrays of gold nanodisks over a mirror, part of the larger class of nanoparticle-over-mirror (NPoM) devices. By systematically mapping the hybrid mode dispersion as a function of array geometry over a large parameter space, we extract the coupling strength via a coupled oscillator model and reveal its dependence on key structural parameters, with gap thickness identified as the primary tuning factor. The resulting hybrid modes enhance the

SUBMITTER: Gherman R 

PROVIDER: S-EPMC12717898 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature