Figure 1

Schematic diagram of a nanoslit metasurface hologram. (a) Illustration of a nanoslit metasurface hologram of Ludwig van Beethoven (original painting by Joseph Karl Stieler in 1820) produced by a nanoslit metasurface and, which was designed by using a CGH technique. (b) The principle on which nanoslit metasurfaces is based. When circularly polarized light is incident on a nanoslit metasurface, its direction becomes opposite because of a phase change. (c) Illustration of a 3 × 3 array of unit pixels on a nanoslit metasurface with; the dimensions, angle, and pitch are shown. (d) Phase change (δ) of a cross-polarized light by designed pixel with a change in the orientation angle (θ), as calculated by an FDTD simulation.