Fig. 1. (a) Schematic diagram of the color filter based on a lossy dielectric-metal structure; (b) reflectance spectra and chromaticity coordinates with increasing n₂ for a fixed k₂ of 0.6; (c) reflectance spectra and chromaticity coordinates with increasing k₂ for a fixed n₂ of 4; (d) color palettes with varying n₂ and k₂.

Fig. 2. (a) Complex refractive index of a-Si:H and MgH₂ and reflectance spectra of CMY filters based on the a-Si:H-Al structure; (b) equivalent conversion relationship between hybrid lossy and quasi-homogeneous dielectric layer based on EMT; (c) calculated effective complex refractive indices of the MgH₂-a-Si:H layer with different thicknesses of MgH₂.

Fig. 3. (a) Reflectance spectra and chromaticity coordinates of yellow and cyan filters without and with the MgH₂ layer in different stacking cases; (b) color gamut of the structure based on a single a-Si:H layer and the proposed structure.

Fig. 4. (a) Reflectance spectra of CMY filters under s-, p-polarized, and unpolarized light illumination when the incident angle increases; (b) schematic diagram of the phases involved in two cases based on different combination orders of MgH₂ and a-Si:H lossy dielectric layers; (c) propagation and reflection phases of the CMY filters as a function of the incident angle under s- and p-polarized light illumination.

Fig. 5. (a) Schematic diagram of the proposed color filter with regard to the dynamic interconversion in the top layer between MgH₂ and Mg; reflectance spectra and corresponding chromaticity coordinates of (b) the cyan filter and (c) the magenta filter when the top layer of MgH₂ is converted to Mg.