期刊
LASER & PHOTONICS REVIEWS
卷 13, 期 5, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.201900065
关键词
dielectric metasurfaces; hydrogenated a-Si; metaholograms; spin-encoded holograms
资金
- National Research Foundation of Korea (NRF) - Ministry of Science and ICT (MSIT) of the Korean government [NRF-2019R1A2C3003129, CAMM-2019M3A6B3030637, NRF2018M3D1A1058998, NRF-2015R1A5A1037668]
- TUBITAK under 2216-Research Scholarship for International Researchers [B.14.2.TBT.0.06.01.02-216-10539]
- HEC's NRPU [10177/Punjab/NRPU/RD/HEC/2017]
- ITU
- NRF-MSIT of the Korean government [NRF-2016H1A2A1906519]
- National Research Foundation of Korea [2015R1A5A1037668] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Dielectric materials that are low-loss in the visible spectrum provide a promising platform to realize the pragmatic features of metasurfaces. Here, all-dielectric, highly efficient, spin-encoded transmission-type metaholograms (in the visible domain) are demonstrated by utilizing hydrogenated amorphous silicon (a-Si:H). In comparison to previously reported visible metaholograms based on TiO2 and other dielectric materials, all-dielectric metasurfaces provide a cost-effective more straightforwardly fabricated (aspect ratio 4.7), CMOS compatible, and comparably efficient solution in the visible domain. A unique way of utilizing polarization as an extra degree of freedom in the design to implement transmission-type helicity-encoded metaholograms is also proposed. The produced images exhibit high fidelity under both right and left circularly polarized illuminations. The proposed cost-effective and CMOS-compatible material and methods open up an avenue for on-chip development of numerous new phenomena with high efficiency in the visible domain.
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