Fig. 3. Metasurface imaging as target image. (a) Schematic diagram of experimental setup; (b) Schematic diagram of unit cell of the metasurface; (c) Scanning electron microscopy image of the metasurface; (d) Schematic diagram of reflective metasurface hologram with LCP and RCP; (e) Simulated results with different GI algorithms; (f) Experimental results with different GI algorithms; (g) Scheme of the optical encryption based on CGI with helicity-dependent metasurface hologram [65]
Fig. 6. (a) Structural diagram of 1D resonant metamaterial apertures for compressed imaging; (b) Reconstructions of different static scenes[77]; (c) Imaging system consisting of dynamic metasurface antennas; (d) Schematic diagram of the dynamic metasurface antennas and the exciting signals[79]
Fig. 7. (a) Scheme of phaseless computational ghost imaging at microwave frequencies using DMA; (b) Structured illumination patterns generated by a DMA[81]; (c) Schematic illustration of DMA to achieve incoherent CGI; (d) Reciprocal images of two targets obtained by averaging over receiver tuning states on the left, transmitter tuning states on the right, and the product of them[82]