Metasurface-Based Structured Light Imaging System NatureComms nanooptics nanophotonics light imaging
Metasurface-based SL imaging platform scattering high-density diffracted beams into the full 180° FOV. Under the illumination of a polarization-independent coherent laser source, the proposed metasurfaces generate ~10 K points over the entire 180° space. The depths of the dot arrays illuminated on the objects are extracted using a stereo matching algorithm. Image Credit: Kim, G., et al. .
3D Imaging and Applications of Metasurfaces Laser-based 3D imaging technology has been utilized in various sensor applications, including virtual/augmented reality , robot vision, and autonomous driving. The depth information of a 3D object is obtained by radiating the target with a controlled laser beam via transmitters and monitoring the diffracted light through a detector.
Metasurfaces are 2D arrangements of engineered nanostructures referred to as meta-atoms, which primarily derive their qualities from the constituent parts, namely wave-guiding and resonant effects. Metasurfaces have been used to achieve unusual light tuning at the nanoscale level. Multiple types of metasurface-based SL projectors, such as 1D dot arrays, 2D dot arrays, and 2D parallel line arrays of light, have been demonstrated analytically and empirically over a 180 degrees FOV by comprehending the total optical response concerning diffraction and interference effects.
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