Ultracompact, high-resolution and continuous grayscale image display based on resonant dielectric metasurfaces.

Since the electromagnetic resonance that happens in dielectric nanobricks can be meticulously designed to control both amplitude and polarization of light, an ultracompact, high-resolution and continuous grayscale image display method based on resonant dielectric metasurfaces is proposed. Magnetic resonance occurs in dielectric nanobricks can yield unusual high reflectivity depending on the polarization state of incident light, which paves a new way for ultracompact image display when the resonant metasurfaces consisting of nano-polarizer arrays operate. Governed by Malus's law, nano-polarizer arrays featured with different orientations have been demonstrated to continuously manipulate the intensity of linearly polarized light cell-by-cell. Hence, it can practically enable recording a high fidelity grayscale image right at the sample surface with resolution as high as 84,667 dpi (dots per inch). This proposed resonant metasurface image (meta-image) display enjoys the advantages including continuous grayscale modulation, broadband working window, high-stability and high-density, which can easily find promising applications in ultracompact displays, high-end anti-counterfeiting, high-density optical information storage and information encryption, etc.