Fig. 5: Experimental results of users’ orientation recognition.
From: Terahertz spoof plasmonic neural network for diffractive information recognition and processing
a The fabrication sample, where the transmitting SSPP antennas (users 1, 2, 3, and 4) can radiate electromagnetic waves to the receiver consisting of four receiving SSPP antennas. b–e Measurement transmission parameters of four users at output ports 4, 7, 10, and 13, respectively. f–h Measured amplitude distributions of different users at 276 GHz, 279 GHz, and 282 GHz, respectively. i–k Confusion matrices at 276 GHz, 279 GHz, and 282 GHz, respectively, corresponding to classification accuracies of 91%, 97.8%, and 91.7%.
