Abstract:
The pursuit of real-time, full-color, three-dimension (3D), and dynamic display has inspired a rich body of industrial and academic research. With the introduction of "Metaverse", there is an increasing demand for high-performance 3D display devices and technologies. Holographic technology is an ideal approach for future naked-eye 3D display. However, traditional dynamic holographic devices have brought many shortcomings such as small field of view (FOV) and limited information capacity, which hinder the practical applications. As a new class of light field modulator, metasurface is expected to achieve remarkable breakthroughs in the field of holographic display with the advantages of their small pixel size and the emerging ability to manipulate light. This paper gives an overview of the development of meta-holography from four aspects: the design strategy, the modulation principle, the methods for realizing dynamic display and the micro-nano fabrication technologies for optical metasurface. We finally include a brief discussion of the future direction in this field.