Reconfigurable and polarization-dependent optical filtering for transflective full-color generation utilizing low-loss phase-change materialsOACSTPCDEI

All-dielectric metasurface,which features low optical absorptance and high resolution,is becoming a promising candi-date for full-color generation. However,the optical response of current metamaterials is fixed and lacks active tuning. In this work,we demonstrate a reconfigurable and polarization-dependent active color generation technique by incorporating low-loss phase change materials (PCMs) and CaF2 all-dielectric substrate. Based on the strong Mie resonance effect and low optical absorption structure,a transflective,full-color with high color purity and gamut value is achieved. The spectrum can be dynami-cally manipulated by changing either the polarization of incident light or the PCM state. High transmittance and reflectance can be simultaneously achieved by using low-loss PCMs and substrate. The novel active metasurfaces can bring new inspira-tion in the areas of optical encryption,anti-counterfeiting,and display technologies.