  This letter presents a theoretical and experimental study on the viability of
obtaining three dimensional super-resolution (i.e. resolution overcoming the
diffraction limit for all directions in space) by means of metamaterial slab
lenses. Although the source field cannot be actually reproduced at the back
side of the lens with super-resolution in all space directions, the matching
capabilities of metamaterial slabs does make it possible the detection of
images with three-dimensional super-resolution. This imaging takes place
because of the coupling between the evanescent space harmonic components of the
field generated at both the source and the detector.
