Fig. 4: Amplitude and phase responses and structural parameter libraries of meta-pixel. | Nature Communications

Fig. 4: Amplitude and phase responses and structural parameter libraries of meta-pixel.

From: Orbital angular momentum- and frequency-dependent high-capacity encrypted hologram through multi-dimensional multiplexing acoustic metasurface

Fig. 4

a Transmitted amplitude and phase vary with the combination of \([{D}_{4}^{1},{H}_{6}^{1}]\) (top) and \([{D}_{4}^{2},{H}_{6}^{2}]\) (bottom), at 13720 Hz and 17150 Hz. Superscript 1 (2) represents the subunit 1 (2). b Structural parameter libraries of combinations of \([{D}_{4}^{1},{H}_{6}^{1}]\) (top) and \([{D}_{4}^{2},{H}_{6}^{2}]\) (bottom) corresponding to 4×8 combinations of transmitted amplitude and phase at 13720 Hz and 17150 Hz. The radial and angular axes represent transmission amplitude and phase, respectively.

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