Holographic device, dynamic holographic display system and dynamic holographic display method

The invention belongs to the technical field of micro-nano optics, and discloses a holographic device, a dynamic holographic display system and a dynamic holographic display method. The holographic device provided by the invention comprises a grating and a metasurface, the grating is an amplitude type transmission grating, incident light can be modulated into circularly polarized light with different amplitude distributions by using the grating, and the metasurface can form holographic images with different channels after the circularly polarized light with different amplitude distributions is incident. On the basis of the technology, the invention provides a dynamic holographic display system and a corresponding method, and multi-channel holographic display can be realized. According to the invention, the precise light control capability of the metasurface is introduced, the programmable function of the grating is obviously expanded, and the method has obvious cost effectiveness, strong coding freedom and co