Vivid colors are imperative for displays and imaging; therefore, dielectric metasurface-based artificial pixels are promising candidates for developing flat, flexible, and/or wearable displays. To achieve a wide color gamut, ensuring the purity and efficiency of nanostructure resonance peaks in the visible spectrum is necessary for structural color design. Low-loss dielectric materials are suitable for achieving vivid colors with structural color pixels. We performed numerical design, semianalytic considerations, and experimental proof-of-concept examinations to demonstrate the performance of the silicon nitride metasurfaces. Apart from traditional metasurface designs that involve transmission and reflection modes, we determined that lateral light incidence on silicon nitride metasurfaces can provide vivid colors through long-range dipole interactions; this can thus extend the applications of such surfaces to eyewear displays and guided-wave illumination.

1.First to demonstrate the Si3N4 color pixels with Mie lattice resonance and considering the effect of substrates, which could create a single resonance peak in the spectra and generate color with high saturation.
2.The device is easy to design and fabricate since the high order Mie lattice resonance can be suppressed at the wavelength shorter than that of Rayleigh anomalies and improve the color saturation. 
3.First to demonstrate the vivid color in both free-space excitation and the lateral light incidence with guided-wave illumination by using the Mie lattice resonance color metasurface.

1. This application can be collaborated with the silicon photonics industry, with the leading advantages of Taiwan＇s process technology (like TSMC, UMC), integrated development of miniaturized silicon photonics platforms and head-mounted display (AR/VR) components
2. This innovation could be combined with the Micro-LED industry to develop the next generation of miniaturized display technology, which can be applied to head-mounted displays and other miniaturized displays.