Journal
NANO LETTERS
Volume 18, Issue 12, Pages 8016-8024Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b04246
Keywords
Noninterleaved metasurface; 6-bit hologram; spin-wavelength encoding; multitasked metasurface
Categories
Funding
- National Research Foundation, Prime Minister's Office, Singapore [NRF-CRP15-2015-03]
- Agency for Science, Technology and Research (A*STAR) SERC Pharos project [1527300025]
- A*STAR Young Investigatorship [0926030138]
- SERC [092154099]
- National Research Foundation [NRF-CRP001-021, NRF-CRP 8-2011-07]
- A*STAR-JCO [1437C00135]
- National Natural Science Foundation of China (NSFC) [61522504]
- Guangdong Provincial Innovation and Entrepreneurship Project [2016ZT06D081]
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Nanostructured metasurfaces demonstrate extraordinary capabilities to control light at the subwavelength scale, emerging as key optical components to physical realization of multitasked devices. Progress in multitasked; metasurfaces has been witnessed in making a single metasurface multitasked by mainly resorting to extra spatial freedom, for example, interleaved subarrays, different angles. However, it imposes a challenge of suppressing the cross-talk among multiwavelength without the help of extra spatial freedom. Here, we introduce an entirely novel strategy of multitasked metasurfaces with noninterleaved single-size Si nanobrick arrays and minimalist spatial freedom demonstrating massive information on 6-bit encoded color holograms. The interference between electric dipole and magnetic dipole in individual Si nanobricks with in-plane orientation enables manipulating six bases of incident photons simultaneously to reconstructed 6-bit wavelength- and spin-dependent multicolor images. Those massively reconstructed images can be distinguished by pattern recognition. It opens an alternative route for integrated optics, data encoding, security encryption, and information engineering.
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