  Near-field enhancement and sub-wavelength imaging properties of a system
comprising a coupled pair of two-dimensional arrays of resonant nanospheres are
studied. The concept of using two coupled material sheets possessing surface
mode resonances for evanescent field enhancement is already well established in
the microwave region. This paper shows that the same principles can be applied
also in the optical region, where the performance of the resonant sheets can be
realized with the use of metallic nanoparticles. In this paper we present
design of such structures and study the electric field distributions in the
image plane of such superlens.
