Figure 4. Far-field subwavelength imaging of a low contrast object.

(a) Acquisition from the far-field of the signals that carry the subwavelength information of the object placed in the near-field of the nanorod medium. We emit a short pulse from one direction (orange line) and receive the time-dependent scattered fields in eight directions (red lines). We repeat this operation for the eight emitting directions. The b and c panels show the geometry of an object (left) and the reconstructed super-resolved image from the far-field signals (right). In b, the distance between the two dielectric bars is 100 nm and the reconstruction clearly shows a resolution of 100 nm. In c, although the geometry of the object is not entirely aligned along the lattice of the metalens, we still demonstrate a subwavelength-resolved image displaying a 80-nm resolution.