Analytical Model of the Three-Dimensional Plasmonic Ruler
Timothy J Davis, Mario Hentschel, Na Liu, Harald Giessen
ACS Nano | AMER CHEMICAL SOC | Published : 2012
An electrostatic eigenmode method that describes the coupling between plasmonic nanoparticles is used to model the optical resonances of the 3D plasmonic ruler. The model provides a mathematical description of the ruler that enables us to identify the key resonance in the scattering spectrum that encodes the location of the central nanorod. The model demonstrates excellent agreement with experimentally measured spectra. We show that the spectra can uniquely encode the horizontal and vertical displacements of the central nanorod. From an understanding of the spatial dependence of the plasmonic coupling between the nanorods, we devise a method for estimating the position of the central nanorod..View full abstract
Awarded by DFG
We acknowledge funding through DFG (FOR 730/SPP1391/Gi269-M/1), BMBF (3D Metamaterial), and the MPI FKF-University guest professorship program.