期刊
ANNALEN DER PHYSIK
卷 534, 期 10, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/andp.202200229
关键词
full space; metasurface holograms; multiple functions; single-layer coding metasurfaces
资金
- National Natural Science Foundation of China (NSFC) [61501275]
- Natural Science Foundation of Heilongjiang Province [YQ2021F004]
- Scientific and technological development project of the central government guiding local [SBZY2021E076]
- Postdoctoral Research Fund Project of Heilongjiang Province of China [LBH-Q21195]
- Fundamental Research Funds of Heilongjiang Provincial Universities of China [135509227]
- Graduate Innovation Research Project of Qiqihar University of Heilongjiang Province of China [YJSCX2021090]
In this work, a 2-bit coding metasurface based on double-face copper-cladded patterns on a single-layer substrate is proposed to independently manipulate electromagnetic wave fronts in full space. The coding metasurface can simultaneously reconstruct two different holographic images without changing the polarization state of the incident wave, and experimental results agree well with the numerically simulated ones.
Metasurfaces play an important role in holographic imaging to flexibly manipulate and control electromagnetic wave fronts. However, metasurface-based holograms present weaknesses in space utilization and efficiency. In this work, a 2-bit coding metasurface based on double-face copper-cladded patterns on a single-layer substrate is proposed, where the electromagnetic waves can be independently manipulated in full space. When illuminated by an x-polarized wave, the co-polarized reflection and cross-polarized transmission components of the coding metasurface can be simultaneously manipulated at two distinct frequencies. The co-polarized reflection efficiency is greater than 0.7 at 15 GHz, and the cross-polarized transmission efficiency attains to 0.4 at 14 GHz. The proposed coding metasurface hologram can simultaneously reconstruct two different holographic images without changing the polarization state of the incident wave, while avoiding crosstalk between different channels. A coding metasurface sample is fabricated and measured, and the experimental results agree well with the numerically simulated ones. The proposed hologram imaging concept highlights great potential applications in the fields of holographic display and information encryption.
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