Collective multipole oscillations direct the plasmonic coupling at the nanojunction interfaces.

ABSTRACT: We present a systematic study of the effect of higher-multipolar order plasmon modes on the spectral response and plasmonic coupling of silver nanoparticle dimers at nanojunction separation and introduce a coupling mechanism. The most prominent plasmonic band within the extinction spectra of coupled resonators is the dipolar coupling band. A detailed calculation of the plasmonic coupling between equivalent particles suggests that the coupling is not limited to the overlap between the main bands of individual particles but can also be affected by the contribution of the higher-order modes in the multipolar region. This requires an appropriate description of the mechanism that goes beyond the general coupling phenomenon introduced as the plasmonic ruler equation in 2007. In the present work,

SUBMITTER: Hooshmand N 

PROVIDER: S-EPMC6765250 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature