January 2019
Spotlight Summary by Yuri Kivshar
Broadband c-Si metasurfaces with polarization control at visible wavelengths: applications to 3D stereoscopic holography
Novel designs of metasurfaces for stereoscopic holography may find multiple innovative applications of flat optics. Unique properties and functionalities of metasurfaces attract a major interest from large industrial players. In recent years, we observed a rapid development of flat optics and the field of metasurfaces, with over a thousand papers every year. The original concept formulated for plasmonic structures has evolved towards low-loss highly efficient dielectric metasurfaces boosted by a rapid development of nanofabrication technologies with high nanolithography resolutions not available just a few years ago.
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.
You must log in to add comments.
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.
Add Comment
You must log in to add comments.
Article Information
Broadband c-Si metasurfaces with polarization control at visible wavelengths: applications to 3D stereoscopic holography
Augusto Martins, Juntao Li, Achiles F. da Mota, Vinicius M. Pepino, Yin Wang, Luiz G. Neto, Fernando L. Teixeira, Emiliano R. Martins, and Ben-Hur V. Borges
Opt. Express 26(23) 30740-30752 (2018) View: Abstract | HTML | PDF