A Spin-Encoded All-Dielectric Metahologram for Visible Light

2019-05-01
Ansari, Muhammad Afnan
Kim, Inki
Lee, Dasol
Waseem, Muhammad Hamza
Zubair, Muhammad
Mahmood, Nasir
Badloe, Trevon
Yerci, Selçuk
Tauqeer, Tauseef
Mehmood, Muhammad Qasim
Rho, Junsuk
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.
Citation Formats
M. A. Ansari et al., “A Spin-Encoded All-Dielectric Metahologram for Visible Light,” pp. 0–0, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32543.