Excitation of coherent plasmon modes in a polymer structure with side resonators

A plasmonic polymer composed of dumbbell resonator （DBR） molecules was synthesized. The DBRs were connected with each other through slits that act as chemical bonds, resulting in a strong exchange current interaction between these DBRs. The polymer structure has side atoms connected to the backbone. A TM wave can be coupled into these side atoms, and a coherent plasmon wave can be excited along the polymer chain. This introduces a resonance peak in the optical transmission spectrum. The dispersion property of such a coherent mode agrees well with the theoretical calculation results.