Surface topology specific metasurface holograms
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Metasurface holograms are usually realized on flat surface topologies. Here we show that flexible holographic metasurfaces can be designed to form an image when applied to arbitrary substrate shapes. We demonstrate that for nonflat surfaces the phase contribution of the substrate determines the symmetry properties of the image. The sensitivity of the hologram to the specific surface topology can be enhanced by engineering the distribution of the phase elements in the metasurface area. The results of this work pave the way for practical applications in security printing technologies, in addition to surface topology and polarization sensors.
Burch , J & Di Falco , A 2018 , ' Surface topology specific metasurface holograms ' , ACS Photonics , vol. 5 , no. 5 , pp. 1762-1766 . https://doi.org/10.1021/acsphotonics.7b01449
© 2018, American Chemical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1021/acsphotonics.7b01449
DescriptionFunding: J.B. and A.D.F acknowledge support from EPSRC (grants No EP/M508214/1, EP/L017008/1).
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