Multistate Reconfigurable Structural Color Enabled by an Antimony Trisulfide Nanograting

The static optical properties of most structural colors limit their scalability, and dynamic control is the most promising method for moving structural color to practical applications. However, current reconfigurable systems are usually triggered by a single external stimuli. Here, we experimentally demonstrate a dielectric grating structure based on the phase change material antimony trisulfide, which simultaneously responds to three stimulus conditions: temperature, linearly polarized light, and ambient refractive index. Distinguishing from most reconfigurable devices that still require the preparation of multisized structures to achieve significant optical tuning, the proposed nanograting achieves a 14.7% sRGB (standard Red Green Blue) gamut adjustment range with a single fabrication size. Furthermore, simulations demonstrate the colorimetric sensing capability of the Sb₂S₃ nanograting originating from guided mode resonance, and experiments validate the advantages of multiple stimuli response in nanopainting. The designed multistimulus response structure color will strongly promote the development of the next generation microdisplay, information encryption, and anticounterfeiting technology.