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. 2016 Oct 14;6:35437. doi: 10.1038/srep35437

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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(a) A schematic showing the holographic rendering of a letter ‘A’ with the passive metamaterial-based hologram. (b) Comparison between holographic rendering with an active phased array and a hologram made of metamaterial-based passive phased array, which eliminates cumbersome phase-shifting electronics and a large number of transducers.