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Proceedings Paper

Bilayered plasmonic metasurface for non-reciprocal holographic image encryption (Conference Presentation)

Paper Abstract

Metasurfaces are known as a powerful tool for complex wavefront shaping. However, two-dimensional metasurface systems of nanoparticles exhibit only a weak spatial asymmetry perpendicular to the surface and therefore have mostly reciprocal optical transmission features. To influence this reciprocity, we present a metasurface design principle for nonreciprocal polarization encryption of holograms. Our approach is based on a two-layer plasmonic metasurface design that introduces a local asymmetry and allows full phase and amplitude control of the transmitted light. We experimentally show that our pixel-by-pixel encoded Fourier-hologram appears in a particular linear cross-polarization channel, while it is disappearing in the reverse propagation direction.

Paper Details

Date Published: 10 March 2020
Proc. SPIE 11289, Photonic and Phononic Properties of Engineered Nanostructures X, 112890E (10 March 2020); doi: 10.1117/12.2545612
Show Author Affiliations
Daniel Frese, Univ. Paderborn (Germany)
Qunshuo Wei, Beijing Institute of Technology (China)
Yongtian Wang, Beijing Institute of Technology (China)
Lingling Huang, Beijing Institute of Technology (China)
Thomas Zentgraf, Univ. Paderborn (Germany)

Published in SPIE Proceedings Vol. 11289:
Photonic and Phononic Properties of Engineered Nanostructures X
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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