Fig. 1. Principle of dynamic space channel meta-hologram.

(A) Structure of space channel meta-hologram element. (B and C) Space channel selective meta-hologram design. All reconstructed images overlap each other if all space channels were opened at the same time (B). Dynamic meta-holographic display can be achieved by opening space channels in the designed sequence (C). (D to G) Space channel multiplexing meta-hologram design. The reconstructed images of different space channels are subgraphs of a whole graph (D). Different space channels are opened in different time sequences to form different space channel combinations (E), which reconstruct different images (F) to achieve dynamic meta-holographic display (G).