Fig. 7: Signal processor enabled by intelligent metasurfaces.
From: Progress on intelligent metasurfaces for signal relay, transmitter, and processor
a Schematic illustration of signal processor. b All-optical diffractive decoder133. c Neuro-metasurfaces for signal processing135. d Dynamical recognition by neuro-metasurfaces135. e Multi-user information propagation131. f Orbital angular momentum detection136. b Reproduced with permission from ref. 133, Copyright © 2023, Yuhang Li et al. c, d Reproduced with permission from ref. 135, Copyright © 2022, Chao Qian et al. e Reproduced with permission from ref. 131, Copyright © 2022, Springer Nature. f Reproduced with permission from ref. 136, Copyright © 2019, Elsevier
