This paper makes the next important step in the field, and it brings flat optics concepts to visual arts and entertainment-related industries. The authors introduce a new broadband stereoscopic hologram metasurface where independent phase control is achieved for two orthogonal polarizations in the visible spectrum, with high-contrast structured elliptical nanorods made of crystalline silicon on a sapphire substrate. Two holograms are combined on the same metasurface where each is encoded with four phase levels. The stereoscopic view is achieved with a pair of cross-polarized filters in front of the observers’ eyes. The stereoscopic effect is surprisingly good with transmission efficiency around 70%. The proposed structure is able to successfully capture depth effects of the reconstructed images, with potential applications in diverse areas such as visual arts, entertainment, and security.
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