Substrate and Fano Resonance Effects on the Reversal of Optical Binding Force between Plasmonic Cube Dimers.

ABSTRACT: The behavior of Fano resonance and the reversal of near field optical binding force of dimers over different substrates have not been studied so far. Notably, for particle clustering and aggregation, controlling the near filed binding force can be a key factor. In this work, we observe that if the closely located plasmonic cube homodimers over glass or high permittivity dielectric substrate are illuminated with plane wave, no reversal of lateral optical binding force occurs. But if we apply the same set-up over a plasmonic substrate, stable Fano resonance occurs along with the reversal of near field lateral binding force. It is observed that during such Fano resonance, stronger coupling occurs between the dimers and plasmonic substrate along with the strong enhancement of the substrate cur

SUBMITTER: Mahdy MRC 

PROVIDER: S-EPMC5537282 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature