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arXiv · 2002.03574

Reconfigurable metasurface hologram by utilizing addressable dynamic pixels

Tianyou Li·Qunshuo Wei·Bernhard Reineke·Felicitas Walter·Yongtian Wang·Thomas Zentgraf·Lingling Huang
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Abstract

The flatness, compactness and high-capacity data storage capability make metasurfaces well-suited for holographic information recording and generation. However, most of the metasurface holograms are static, not allowing a dynamic modification of the phase profile after fabrication. Here, we propose and demonstrate a dynamic metasurface hologram by utilizing hierarchical reaction kinetics of magnesium upon a hydrogenation/dehydrogenation process. The metasurface is composed of composite gold/magnesium V-shaped nanoantennas as building blocks, leading to a reconfigurable phase profile in a hydrogen/oxygen environment. We have developed an iterative hologram algorithm based on the Fidoc method to build up a quantified phase relation, which allows the reconfigurable phase profile to reshape the reconstructed image. Such a strategy introduces actively controllable dynamic pixels through a hydrogen-regulated chemical process, showing unprecedented potentials for optical encryption, information processing and dynamic holographic image alteration.

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Tianyou Li, Qunshuo Wei, Bernhard Reineke, Felicitas Walter, Yongtian Wang, Thomas Zentgraf, Lingling Huang. 2020-02-10. Reconfigurable metasurface hologram by utilizing addressable dynamic pixels. https://doi.org/10.1364/oe.27.021153

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