Fig. 4: Temporally programable holograms.
a Illustration of designing the superpixel temporal hologram, in which binary amplitude holograms corresponding to different image parts of digit 8 can be spatially multiplexed. b The fabricated 180 × 180 superpixel hologram with a pixel size of 3 μm. Scale bar, 200 μm. c The zoom-in temporal hologram microscopy images and corresponding holography images. Scale bar, 5 μm. d The experimental results of temporal hologram encryption, showing that at time T1, all the fabricated holograms display digit 8 while at time T2, various digit holography images appear. Scale bar, 5 μm. e Inverse optimization flow chart for three independent holography images I, P, and C (FFT fast Fourier transform). f Hologram microscopy images and corresponding experimental holography images of I, P, and C. Scale bar, 5 μm.
