This PDF file includes:

• Supplementary Text
• Section S1. The deposition and transition of TiO₂ film
• Section S2. Fabrication process and characterization of the nanostructures
• Section S3. Numerical calculation and the Mie resonances in TiO₂ metasurfaces
• Section S4. Characterization of TiO₂ metasurfaces
• Section S5. Dynamic image in TiO₂ metasurfaces
• Section S6. The photoreduction with TiO₂ metasurfaces
• Fig. S1. The deposition and transition of TiO₂ film.
• Fig. S2. Fabrication process and characterization of the nanostructures.
• Fig. S3. Numerical calculation and the Mie resonances in TiO₂ metasurfaces.
• Fig. S4. The numerical simulation of Mie resonance.
• Fig. S5. The numerical simulation of the TiO₂ metasurface before and after H⁺ implantation.
• Fig. S6. Optical measurement of TiO₂ metasurfaces.
• Fig. S7. The color and reflection spectrum of TiO₂ metasurfaces.
• Fig. S8. The SEM image of “COLOR” pattern without guide lines.
• Fig. S9. Setup for photoreduction and the characterization of the TiO₂ metasurface in AgNO₃ solution.
• Fig. S10. The contrast experiment of Ag photoreduction and characterization of the generated Ag nanoparticle.
• Fig. S11. Characterization of particle sizes of Ag photoreduction on TiO₂ metasurfaces.

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