Fig. 1. Schematic of the dielectric dual-wavelength dual-polarization metasurface and the unit cell of the structure

Fig. 2. Simulated results of the periodic unit cells. (a) Reflectivity for x- and y-polarized incident unit structure (θ=0); (b) Electric and magnetic distributions at two resonant wavelengths for x- and y-polarized incident light (1373 nm and 1630 nm); (c) Electromagnetic multi-pole decomposition for x- and y- polarized incident light; (d) Reflective anomalous intensity and phase for different orientation angles θ at two resonant wavelengths (with left-handed circularly polarized incidence)

Fig. 3. Simulated grayscale imaging and anomalous reflection wavefront manipulation. (a), (b) Anomalous reflection at two resonant wavelengths with a phase gradient array; (c)-(f) Grayscale imaging for dual-wavelength and dual-polarization incidence for the same metasurface sample. The operating wavelength is 1373 nm in (a), (c), (e) and 1630 nm in (b), (d), (f)