Journal
LASER & PHOTONICS REVIEWS
Volume 10, Issue 3, Pages 500-509Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.201500314
Keywords
metasurface; dielectrics; holography; nanophotonics
Categories
Funding
- National Research Foundation, Prime Minister's Office, Singapore under its Competitive Research Program (CRP Award) [NRF-CRP10-2012-04]
- Agency for Science, Technology and Research (AstarSTAR) under BEP grant [1521480031 (R-263-000-B88-305)]
- National Natural Science Foundation of China [61205052]
- National Natural Science Foundation of China under administration of the NUS-Suzhou Institute [61571186, R-2015-S-01]
- Institute of Materials Research and Engineering
- Agency for Science, Technology and Research (AstarSTAR) [1021740172]
- Agency for Science, Technology and Research (AstarSTAR) Young Investigatorship [0926030138]
- SERC [092154099]
- National Research Foundation [NRF-CRP 8-2011-07]
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The dielectric metasurface hologram promises higher efficiencies due to lower absorption than its plasmonic counterpart. However, it has only been used, up to now, for controlling linear-polarization photons to form single-plane holographic images in the near-infrared region. Here, we report a transmission-type metahologram achieving images in three colors, free from high-order diffraction and twin-image issues, with 8-level modulation of geometric phase by controlling photon spin via precisely patterned Si nanostructures with varying orientations. The resulting real and virtual holographic images with spin dependence of incident photons natively enable the spin degeneracy removal of light, leading to a metahologram-enabled spin Hall effect of light. Low-absorption dielectrics also enable us to create holograms for short-wavelength light down to 480 nm, thus spanning the three primary colors. It possesses the potential for compact color-display chips using mature semiconductor processes, and holds significant advantages over previous metaholograms operating at longer wavelengths.
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