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Nat Commun. 2015 Sep 10;6:8241. doi: 10.1038/ncomms9241.

Helicity multiplexed broadband metasurface holograms.

Author information

1
SUPA, Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
2
School of Physics &Astronomy, University of Birmingham, Birmingham B15 2TT, UK.
3
Department of Physics, Hong Kong Baptist University, Kowloon Tong, Hong Kong.
4
School of Electronic Information, Wuhan University, Wuhan 430072, China.
5
Guangxi Experiment Center of Information Science, Guilin University of Electronic Technology, Guilin 541004, China.
6
Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong.
7
State Key Laboratory of Millimeter Waves, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong.

Abstract

Metasurfaces are engineered interfaces that contain a thin layer of plasmonic or dielectric nanostructures capable of manipulating light in a desirable manner. Advances in metasurfaces have led to various practical applications ranging from lensing to holography. Metasurface holograms that can be switched by the polarization state of incident light have been demonstrated for achieving polarization multiplexed functionalities. However, practical application of these devices has been limited by their capability for achieving high efficiency and high image quality. Here we experimentally demonstrate a helicity multiplexed metasurface hologram with high efficiency and good image fidelity over a broad range of frequencies. The metasurface hologram features the combination of two sets of hologram patterns operating with opposite incident helicities. Two symmetrically distributed off-axis images are interchangeable by controlling the helicity of the input light. The demonstrated helicity multiplexed metasurface hologram with its high performance opens avenues for future applications with functionality switchable optical devices.

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