Expression of Concern: Field enhancement by spherical dimers in the quasistatic regime

The properties of plasmonic nanoparticles in the vicinity of other plasmonic nanoparticles differ from those of individual nanoparticles due to the interaction between the nanoparticles. In this paper, we study the field enhancement by dimers, a result of the plasmon oscillation resonance. Additionally, the resonance properties of dimers depend on the separation between the nanoparticles constituting the dimer. In our study, we use the quasistatic approximation together with translation relations for spherical harmonics in order to efficiently capture the properties of plasmonic dimers.