Advanced Photonics, 2019, 1 (3): 036001, Published Online: Jun. 19, 2019
Dielectric metasurfaces for distance measurements and three-dimensional imaging Download: 872次
optics nanophotonics metasurfaces Mie-resonances three-dimensional imaging point-spread function engineering
Abstract
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.
Chunqi Jin, Mina Afsharnia, René Berlich, Stefan Fasold, Chengjun Zou, Dennis Arslan, Isabelle Staude, Thomas Pertsch, Frank Setzpfandt. Dielectric metasurfaces for distance measurements and three-dimensional imaging[J]. Advanced Photonics, 2019, 1(3): 036001.