  Epsilon near zero (ENZ) conditions have been observed to enhance
superconducting properties of a composite metamaterial based on random mixing
of superconductor and ferroelectic nanoparticles. Here we analyse several other
promising experimental geometries, which may considerably enhance electron
pairing interaction in a metamaterial superconductor. The proposed geometries
may be fabricated at the current level of nanotechnology development. They
enable tuning of both frequency and spatial dispersion of the effective
dielectric response function of the metamaterial, thus enabling optimization of
the metamaterial superconductor properties.
