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Fig. 5 | eLight

Fig. 5

From: Directly wireless communication of human minds via non-invasive brain-computer-metasurface platform

Fig. 5

More functions of versatile wavefront syntheses using EBCM. a The experiment photograph of the pattern encoding scheme. b The illustration of beam scanning by EBCM. The visual-staring of BCI operator directly drives the metasurface to adjust the scattering direction to the desired angle. Each button relates to a specific scattering direction as labelled. c Three typical EM functions including beam scanning, OAM-beam generation, and RCS control. dg The simulated results of four kinds beam-scanning fields, where the measured result of the main direction is marked with the red cross, as listed in Supplementary Note S6 [36]. The scattering beam is deflected from 0° to 45° along the x-axis. gj The simulated field results of RCS control, where ‘01’ to ‘04’ indicate the four levels of reflection intensity. k, l The far-field simulation results of OAM modes + 1 and + 2. The central null is clearly observed

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