The image depicts nanostructured optical elements consisting from resonant periodic metasurfaces made from silicon nanodiscs, which enable to control the phase of transmitted light by changing their lateral geometry parameters. The different colors in the photograph are generated since different periodicities are used, which diffract light differently. These elements enable three-dimensional imaging with a single camera, showing that metasurfaces can implement complicated optical functionalities.
2019, Vol. 1, Issue 3, 6 Article(s)
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