Figure 5.

Experimental setup and measurement results of the light‐controlled digital coding metasurface. a) The experimental setup. When light source turns off, the measured reflection beams of the light‐controlled digital metasurface. b) 3.75 GHz, c) 4.02 GHz. Measured reflection beams of the light‐controlled digital metasurface at 3.75 GHz as illuminating the metasurface with d) white light, f) red light, h) yellow light. Measured reflected beams of the light‐controlled digital metasurface at 4.02 GHz as illuminating the metasurface with e) white light, g) red light, and i) yellow light.