Structural Color of Multi-Order Fabry–Perot Resonator Based on Sc0.2Sb2Te3 Enhanced Saturated Reflection Color

The structural color based on the Fabry–Perot (F–P) resonator has been extensively applied lithography-free and tunable displays. Conventional F–P cavity-based technology exhibits a wide half maximum full width (fwhm), thus causing low saturation. In this study, Sc0.2Sb2Te3(SST) structure of multi-order cavity resonance was proposed to obtain high-saturation colors. surface absorber coated with an SST film, such that reflection effect at nonresonant wavelengths reduced. Moreover, ITO layer stacking served as for multi-level modulation, only resonant wavelength allowed reflect. On basis, fwhm nearly 25 nm peak reflectance 90 achieved. With above structure, saturation can be dynamically regulated by phase state SST. It is noteworthy 60% sRGB gamut space 50% aRGB currently modulation subsurface expected expand range high-level micro-nano display technology.