Negative Refractive Index Fishnet Enhancement by Wire Shift

We report a modification of the negative refractive index fishnet design introduced by Ding et al.¹, where the gold wires connecting two adjacent slabs of the fishnet are shifted from the central axis. This new design, referred to as the bd design, displays a negative refractive index twice as low as the original, while drastically reducing its loss. We use simulations of the inner electromagnetic fields to explain its superior performances.