Three-primary-color color holographic metasurface based on dual-channel polarization multiplexing and design method thereof

Abstract

The invention discloses a three-primary-color holographic metasurface based on dual-channel polarization multiplexing and a design method thereof. According to the color hologram of the metasurface, two orthogonal circular polarization channels are used to process three primary color components R, G and B of a color image, corresponding dispersion compensation is carried out for the wavelength of each component, the crosstalk problem of the three primary color components of the color hologram is solved, and the metasurface has the advantages of an angle multiplexing mode and a polarization multiplexing mode. On the basis, a phase-type computer-generated hologram is realized through phase regulation and control of each periodic nanometer unit forming the metasurface, and a color hologram can be presented in a far field under a normal incidence condition. The invention provides a new way for the metasurface color holography, and the metasurface can be applied to the fields of color holographic display and the like.

Description

technical field [0001] The invention relates to the fields of micro-nano optics and color holography, in particular to a three-primary color holographic metasurface based on dual-channel polarization multiplexing and a design method thereof. Background technique [0002] Metasurface materials have the ability to control electromagnetic waves in the sub-wavelength range, and have the advantages of high imaging quality, large spatial field of view, and high energy utilization. It is an ideal coding material for computational holography. With the development of technology and the progress of processing technology, metasurface holography has gradually developed from single-color holography to color holography. [0003] The realization of color holography is mainly to divide the different primary color components of the color image into different channels for processing through different multiplexing methods. At present, the spatial multiplexing method is mostly used, which comb...

AI Technical Summary

Problems solved by technology

The color holographic metasurface design method adopts a large diffraction angle design, and only processes the three primary color components of the color image R, G, and B through two orthogonal circular polarization channels, and performs corresponding diffraction dispersion for different wavelengths corresponding to each component. Compensation, which solves the problem of mutual crosstalk between the three primary color components of color holography

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