We describe an encrypted holographic data-storage system that combines orthogonal-phase-code multiplexing with a random-phase key. The system offers the security advantages of random-phase coding but retains the low cross-talk performance and the minimum code storage requirements typical in an orthogonal-phase-code-multiplexing system.
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Article Synopsis
- - Holography is crucial for advancing various technologies like 3D displays, LiDAR, optical encryption, and AI, by facilitating effective optical information storage and processing.
- - The review discusses the evolution from traditional volume holograms to modern digital holography using ultrathin metasurfaces, highlighting holographic multiplexing and fabrication techniques.
- - The potential applications of metasurface holography are explored, particularly in high bandwidth scenarios that enhance sensitivity to light's orbital angular momentum, with a look towards future advancements in the field.
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