Fig. 1: Schematic illustration of the AM holography for optical nested encryption.

The AM holography depends on arbitrary superimpose the SAM and OAM eigenstates in the output field. For the spin-orbital locked holography (SOLH), the reconstruction of the four holographic images “L, R, X, Y” depends on the incident light carrying certain SAM and OAM values (indicated as |σ, l >). For the spin-superimposed holography (SSH), the four Arabic numbers “1, 2, 3, 4” with specific spatially distributed SoPs are reconstructed under the incident XLP Guassian light (indicated as |0, 0 >). For the optical nested encryption, the reconstructed SOL holographic images are used to perform as the keys (translated to certain SoPs represented as <2χ, 2ψ | , where χ and ψ indicate the ellipticity angle and azimuth angle, respectively.) of the next decryption and the encrypted information is fully unlocked by the generated SS holographic images