INCOHERENT HOLOGRAPHIC IMAGING WITH METASURFACES
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United States of America Patent
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Apr 18, 2019
app pub date -
Oct 15, 2018
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Oct 16, 2017
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Abstract
A birefringent metasurface lens formed by an array of nanoposts generates different phase profiles for different incident electromagnetic waves of different polarization. A first polarization is focused at a first focal length, while a second polarization is focused at a second focal length. A variable phase retarder and a polarizer generate interference patterns for each phase difference between the two incident polarizations. The interference patterns are used to generate a hologram, allowing reconstruction of the image of an object.
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