Fig. 1. Structure of color filter model based on plasmonic metasurfaces

Fig. 2. Real part of refractive index of Si₃N₄ and TiO₂. (a) Si₃N₄; (b) TiO₂

Fig. 3. Comparison of model structures. (a) Hole array structure; (b) disk array structure

Fig. 4. Transmission spectra and corresponding CIE color maps of three structures. (a) Transmission spectrum of cube array structure; (b) transmission spectrum of periodic pore structure; (c) transmission spectrum of disk array structure; (d) CIE color map of cube array structure; (e) CIE color map of periodic pore structure; (f) CIE color map of disk array structure

Fig. 5. Distributions of electromagnetic field at resonance peak and transmission rate of 0. (a) xoy cross-sectional electric field at resonance peak; (b) xoy cross-sectional electric field at transmission rate of 0; (c) xoy cross-sectional magnetic field at resonance peak; (d) xoy cross-sectional magnetic field at transmission rate of 0

Fig. 6. Transmittance curves and CIE color map under different periods P. (a) Transmittance curves; (b) CIE color map

Fig. 7. Transmittance curves and CIE color map of different waveguide layer thicknesses H₂. (a) Transmittance curves; (b) CIE color map

Fig. 8. Transmittance curves and CIE color map of different interlayer thicknesses H₃. (a) Transmittance curves; (b) CIE color map

Fig. 9. Transmittance curves and CIE color map of different cube heights of Al blocks H_m. (a) Transmittance curves; (b) CIE color map

Fig. 10. Transmittance curves and CIE color map of different Al block widths W. (a) Transmittance curves; (b) CIE color map

Fig. 11. Results of the best plasma color filtering model. (a) Transmittance curve; (b) CIE color map