Strong and weak polarization-dependent interactions in connected and disconnected plasmonic nanostructures.

ABSTRACT: We explore numerically and experimentally the formation of hybridized modes between a bright mode displayed by a gold nanodisc and either dark or bright modes of a nanorod - both elements being either separated by a nanometer-size gap (disconnected system) or relied on a metal junction (connected system). In terms of modeling, we compare the scattering or absorption spectra and field distributions obtained under oblique-incidence plane wave illumination with quasi-normal mode computation and an analytical model based on a coupled oscillator model. Both connected and disconnected systems have very different plasmon properties in longitudinal polarization. The disconnected system can be consistently understood in terms of the nature of hybridized modes and coupling strength using either QNMs

SUBMITTER: Eschimese D 

PROVIDER: S-EPMC9417476 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature