Fig. 2: Schematic diagram of analog computational system utilizing single-layer Huygens’ metasurface.
From: Single-layer spatial analog meta-processor for imaging processing
a Derivative operation and b cross-correlation operation performed on the input image. The inset shows the photograph of the star in the badge of HIT, which is defined as the reference image here. c The experiment set-up with a zoomed-in view of the fabricated Huygens’ metasurface (see Supplementary Note 9 for photographs of the fabricated Huygens’ metasurfaces).
