Fig. 1. Working principle and schematic diagram of reconfigurable metasurface. (a) Schematic diagram of reconfigurable metasurface, the left and right images represent the colors of the phase change material (Sb₂S₃) in its amorphous and crystalline states, respectively; (b) single unit of the metasurface; (c) refractive index and extinction coefficient of TiO₂ and Sb₂S₃

Fig. 2. Influence of film thickness on reflection and transmission spectra of metasurface. (a)(d) Sb₂S₃ thickness; (b)(e) upper TiO₂ thickness; (c)(f) lower TiO₂ thickness

Fig. 3. Reflection spectra of the metasurface and electromagnetic distribution. (a)(b) Reflection spectra of the metasurface with phase change materials in the amorphous state and crystalline stat; (c) electric field intensity (540.5 nm) and magnetic field intensity (471.5 nm) distributions of the metasurface in the amorphous state (left) and crystalline state (right)

Fig. 4. Absorption rate of reconfigurable metasurface

Fig. 5. Continuous modulation of reconfigurable metasurfaces. (a) Reflection spectra; (b) transmission spectra; (c) CIE 1931 chromaticity diagram

Fig. 6. Influence of structural parameters on the color and color gamut of reflections from the metasurface. (a)(c) Color and chromaticity diagrams of the phase change material in amorphous state under different structural parameters; (b)(d) color and chromaticity diagrams of the phase change material in crystalline state under different structural parameters

Fig. 7. Influence of environmental refractive index on reflection spectra and color of the metasurface. (a) Reflection spectra; (b) color