Dielectric metasurfaces for distance measurements and three-dimensional imaging

Ultrathin metasurfaces have shown the capability to influence all aspects of light propagation. This has made them promising options for replacing conventional bulky imaging optics while adding advantageous optical properties or functionalities. We demonstrate that such metasurfaces can also be appl...

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Bibliographic Details
Published in:Advanced photonics 2019-05, Vol.1 (3), p.036001-036001
Main Authors: Jin, Chunqi, Afsharnia, Mina, Berlich, René, Fasold, Stefan, Zou, Chengjun, Arslan, Dennis, Staude, Isabelle, Pertsch, Thomas, Setzpfandt, Frank
Format: Article
Language:English
Subjects:
Cameras
Design
Distance measurement
Imaging
Lenses
Light
Metasurfaces
Optical properties
Point spread functions
Three dimensional imaging
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Summary:Ultrathin metasurfaces have shown the capability to influence all aspects of light propagation. This has made them promising options for replacing conventional bulky imaging optics while adding advantageous optical properties or functionalities. We demonstrate that such metasurfaces can also be applied for single-lens three-dimensional (3-D) imaging based on a specifically engineered point-spread function (PSF). Using Huygens’ metasurfaces with high transmission, we design and realize a phase mask that implements a rotating PSF for 3-D imaging. We experimentally characterize the properties of the realized double-helix PSF, finding that it can uniquely encode object distances within a wide range. Furthermore, we experimentally demonstrate wide-field depth retrieval within a 3-D scene, showing the suitability of metasurfaces to realize optics for 3-D imaging, using just a single camera and lens system.
ISSN:2577-5421
2577-5421
DOI:10.1117/1.AP.1.3.036001