Concentric
nanostructures provide a unique architecture to manipulate
light by modification of their internal geometry with minimal changes
to their overall size. In this work, we have theoretically examined,
using finite difference time domain simulations, the plasmonic properties
of a concentric cubic nanostructure consisting of a silver (Ag) core,
silica (SiO<sub>2</sub>) interlayer, and gold (Au) shell. These “bimetallic
fanocubes” display two separate geometry dependent Fano resonances
in the visible and in the near-infrared. We employed a plasmon hybridization
model to understand the origin of the spectral features and observe
distinct hybridized modes contributed by the edges and corners, which
is unique to the cubic geometry. Specifically, we note that the “nonbonding”
mode that is essentially dark and not observable in spherical concentric
nanostructures is enhanced in the bimetallic fanocubes. We show the
far-field properties, and Fano resonances of the fanocubes can be
tuned by altering the thickness of the silica layer, the thickness
of the Au shell, and by breaking symmetry. Further, we have examined
the refractive index sensing and directional scattering abilities
of the fanocubes to ultimately enable their use in a range of applications,
harnessing their absorption and scattering properties
