Full‐Color 3D Information Encryption in Super Optical Lattices with Double‐Activated Angle‐Chromaticity Keys

Abstract Secure interaction of large‐capacity 3D information urgently requires the development of an advanced encryption strategy. Although various types of photochromic holographic data storage are explored, building an accurate information encryption/decryption platform with simple preparation, high efficiency, and long‐term stability remains a challenge. Herein, an ultra‐security encryption platform based on large‐scale and low‐cost manufactured plasmonic plastics is proposed. Super optical lattices are constructed by the periodic arrangement of silver clusters in polyvinyl alcohol matrix, which enables the encrypted hologram to achieve precise mapping relationship between diffraction angle and optical chromaticity. Multiple pieces of holographically stereoscopic information with different image profiles and colors are cleverly hidden in a single recording point of the plastic. Only by determining the double‐activated encryption keys of the observation angle and readout wavelength can the correct hologram pixels be displayed. The encrypted information in the super optical lattice is predicted to be stably stored for ≈91 years at room temperature (25 °C), covering almost one human cycle lifespan. The versatile configuration provides highly promising pathways for optical encryption, persistent data storage, and full‐color displays.