Highly efficient holograms based on c-Si metasurfaces in the visible range.

This paper reports on the first hologram in transmission mode based on a c-Si metasurface in the visible range. The hologram shows high fidelity and high efficiency, with measured transmission and diffraction efficiencies of similar to 65% and similar to 40%, respectively. Although originally designed to achieve full phase control in the range [0-2 pi] at 532 nm, these holograms have also performed well at 444.9 nm and 635 nm. The high tolerance to both fabrication and wavelength variations demonstrate that holograms based on c-Si metasurfaces are quite attractive for diffractive optics applications, and particularly for full color holograms. (C) 2018 Optical Society of America under the terms of the OSA Open Access Puhlishing Agreement