Fig. 1. Conceptual configuration of multi-focus meta-hologram with multi-channel transmission.

Fig. 2. (a) 3D view and (b) top view of the designed metasurface unit. Magnitude and phase spectra of the meta-atoms with different lengths ly under (c) x-polarization excitation or (d) y-polarization excitation. The simulated (e) magnitude and (f) phase of the unit cell with lx=ly=2.09 mm under x-polarization excitation in different incident angles.

Fig. 3. Magnitudes and phases of the transmission coefficients obtained by 2D scanning simulation in x and y polarizations.

Fig. 4. (a) Top view of a part of metasurface and whole supercell. (b) Target focus image.

Fig. 5. (a)–(d) Target focus images and (e)–(h) corresponding required phase distributions for x-LP, y-LP, LCP, and RCP points.

Fig. 6. Simulated normalized magnitude distribution of (a) Ex, (b) Ey, (c) El, and (d) Er components at 26 GHz.

Fig. 7. (a) Fabricated metasurface sample and (b) experimental setup.

Fig. 8. Measured normalized magnitude distribution of (a) Ex, (b) Ey, (c) El, and (d) Er components at 26 GHz.

Fig. 9. Simulated and measured normalized amplitude curves of (a) Ex, (b) Ey, (c) El, and (d) Er at 26 GHz.

Fig. 10. Normalized magnitudes distributions of (a) theoretical, (b) simulated, and (c) measured combined electric transmitted field at 26 GHz.