Abstract
Plasmonic nanostructures providing enormous diversified applications are always a boon for the nanomaterial researchers. The light-matter interaction additionally provides various plasmonic modes, which are studied, in general, with the optical spectra along with the near field enhancement plots. Further, to visualize all the hybrid plasmonic modes between any two coupled nanostructures, the eigenmode expansion is employed as it’s an analytical calculation for optical response of interacting nanostructures. Herein, we have simulated the optical spectra for various morphology of Au nanostructures and also the Au-Au dimer nanospheres using MATLAB based Boundary element method (BEM), which requires less computing space and time. Different plasmonic modes and their respective coupling decay was calculated by modifying the interparticle gap and incident angle of the plane wave. These modes were further overviewed using the eigenmode determination which provides the properties of plasmonic lattices. The refractive index sensing was also analyzed, representing the individual sensitivity for the corresponding nanostructures.
Published Version
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