Silicon metasurface embedded Fabry–Perot cavity enables the high-quality transmission structural color

While nanoscale color generations have been studied for years, the high-performance transmission structural color, simultaneously equipped with large gamut, high resolution, and optical multiplexing abilities, still remains as a hanging issue. Here, a silicon metasurface embedded Fabry-Perot cavity is demonstrated to address this problem. By changing the planar geometries of meta-atoms, the cavities provide transmission colors with 194% sRGB gamut coverage and 141,111 DPI resolution, along with more than 300% enhanced angular tolerance. Such high density allows two-dimensional color mixing at the diffraction limit scale. Benefitting from the polarization manipulation capacity of the metasurface, arbitrary color arrangements between cyan and red for two orthogonal linear polarizations are also realized. Our proposed cavities can be used in filters, printings, optical storage, and many other applications in need of high quality and density colors.