Simultaneous 3D and Full Stokes Polarization Imaging Based on All‐Dielectric Metalens Network

Abstract Compared with conventional intensity imaging, 3D and full Stokes polarization imaging can obtain higher‐dimensional information about the objects. Here, a simultaneous 3D and full Stokes polarization imaging method using an all‐dielectric metalens network (ADMN) has been proposed and experimentally demonstrated. The proposed ADMN is composed of three sub‐metalenses simultaneously working for 0°/90°, 45°/135° linear polarization (LP), and left/right‐handed circular polarization (L/RCP), respectively, from which the full Stokes polarization images can be obtained. Simultaneously, the 3D images of the object can be constructed by the parallaxes among different images obtained by different sub‐metalenses. At the design wavelength of 532 nm, experimental results show that the averaged extinction ratios of the LP and CP of the fabricated ADMN are ≈10:1 and ≈23:1, respectively. The typical depth range of the 3D imaging reaches 250 mm with a diameter of the sub‐metalenses of 1.2 mm and a baseline distance of 65 mm between sub‐metalenses, and the average relative measurement accuracy is ≈0.8%. The proposed method provides new ideas for simultaneous 3D and full Stokes polarization imaging, target recognition, and stress detection.