Cascaded liquid crystal holography for optical encryption
Zeyu Wang, Han Zhang, Xiaoheng Liu, Yunjie Dou, Wei Duan, Wei Chen, Lingling Ma, Yanqing Lu · Chinese Optics Letters · 2023
Cascaded holography coupled with the secret-sharing scheme has recently gained considerable attention due to its enhanced information processing and encryption capabilities.Here, we propose a new holographic iterative algorithm and present the implementation of cascaded liquid crystal (LC) holography for optical encryption.Each LC layer acts as the secret key and can generate a distinct holographic image.By cascading two LC elements, a new holographic image is formed.Additionally, we showcase the dynamic optical encryption achieved by electrically switching LCs with combined electric keys.This work may offer promising applications in optical cryptography, all-optical computing, and data storage.