Flat photonic lattices for near-field imaging with enhanced depth of field

摘要

We numerically evaluated the 3D PSF of stratified negative-index superlenses. We determined in terms similar to the Rayleigh criterion the limit of resolution characterizing these image formers. Under some circumstances, the limit of resolution may drop approximately one order of magnitude. We investigated this significant increase of the resolution power in detriment of reducing the depth of field