Full Color 3D Meta‐Holography Based on Achromatic Fresnel Near‐Field Diffraction Algorithm

Abstract

<p>Metasurface, composed of sub-wavelength unit cells, can provide unprecedented control over the wavefront and bring new opportunities for the development of holography. How to realize achromatic color meta-holography has always been an urgent problem in meta-holography. Here, a full-color 3D meta-holography based on an achromatic Fresnel near-field diffraction algorithm is proposed to break through the chromatic aberration limitation inherent in traditional meta-holography. Such a characteristic allows for the achievement of achromatic color holography, without necessitating any adjustments to the optical system or the metasurfaces. Utilizing a Pancharatnam-Berry geometric-phase-based metasurface, an achromatic holography is experimentally demonstrated with a 5000 × 5000 resolution, 17 mm depth, and a 68° viewing angle. This technology significantly increases the degree of freedom in design and application, and it is also expected to be applied to other holographic optical devices such as holographic lenses, thereby avoiding complex achromatic design processes.</p>