Fig. 1. Schematic of polarizer structure

Fig. 2. Schematics of fabrication process of three-direction polarization grating array. (a) Laser processing; (b) single super pixel

Fig. 3. Comparison of laser ablation morphologies. (a) Laser power density is 2.99×10⁵ W/cm²; (b) scan line spacing is 0.004 mm; (c) pulse repetition rate is 72.62%; (d) laser power density is 5.89×10⁵ W/cm²; (e) scan line spacing is 0.028 mm; (f) pulse repetition rate is 86.8%; (g) original appearance of subwavelength metal grating polarizer

Fig. 4. SEM images of morphologies of polarizer before and after ablation. (a) Before ablation; (b) after ablation

Fig. 5. Transmittances of polarizer before and after ablation

Fig. 6. Physical images of polarization filter. (a) Pixel size is 100 μm; (b) pixel size is 200 μm

Fig. 7. Schematic diagrams of optical crosstalk. (a) Large aperture; (b) small aperture.

Fig. 8. Polarization images. (a) Original image for polarizer full-covering; (b) original image for polarizer semi-covering; (c) polarization degree reconstruction map for polarizer full-covering; (d) polarization degree reconstruction map for polarizer semi-covering; (e) polarization angle reconstruction map for polarizer full-covering; (f) polarization angle reconstruction map for polarizer semi-covering