Trans-reflective RGB achromatic metalens for wide field-of-view and high readability augmented reality imaging

Augmented reality (AR) has garnered significant attention in recent years for its advanced display capabilities.Highperforming AR demands lightweight and integrated optical components.Metalenses offer a solution, as they can meet these requirements through their multifunctional and integrative potential.In this work, we propose a trans-reflective red-green-blue (RGB) achromatic AR metalens composed of titanium dioxide (TiO 2 ) nanopillars and a multiwavelength notch filter.The AR metalens achieves balanced focusing efficiencies for obliquely incident light, with a field of view exceeding 90, which ensures excellent readability in various scenarios for AR devices.Additionally, ambient light can pass efficiently through the metalens.This design functions both as an eyepiece and an optical combiner, demonstrating strong potential for AR applications.