Multi-dimensional multiplexing optical secret sharing framework with cascaded liquid crystal holograms  

作　　者：Keyao Li Yiming Wang Dapu Pi Baoli Li Haitao Luan Xinyuan Fang Peng Chen Yanqing Lu Min Gu 

机构地区：[1]Institute of Photonic Chips,University of Shanghai for Science and Technology,Shanghai 200093,China [2]Centre for Artificial-Intelligence Nanophotonics,School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China [3]National Laboratory of Solid State Microstructures,and College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093,China

出　　处：《Opto-Electronic Advances》2024年第1期28-35,共8页光电进展（英文）

基　　金：support from the National Natural Science Foundation of China (No.62005164,62222507,62175101,and 62005166);the Shanghai Natural Science Foundation (23ZR1443700);Shuguang Program of Shanghai Education Development Foundation and Shanghai Municipal Education Commission (23SG41);the Young Elite Scientist Sponsorship Program by CAST (No.20220042);Science and Technology Commission of Shanghai Municipality (Grant No.21DZ1100500);the Shanghai Municipal Science and Technology Major Project,and the Shanghai Frontiers Science Center Program (2021-2025 No.20).

摘　　要：Secret sharing is a promising technology for information encryption by splitting the secret information into different shares.However,the traditional scheme suffers from information leakage in decryption process since the amount of available information channels is limited.Herein,we propose and demonstrate an optical secret sharing framework based on the multi-dimensional multiplexing liquid crystal(LC)holograms.The LC holograms are used as spatially separated shares to carry secret images.The polarization of the incident light and the distance between different shares are served as secret keys,which can significantly improve the information security and capacity.Besides,the decryption condition is also restricted by the applied external voltage due to the variant diffraction efficiency,which further increases the information security.In implementation,an artificial neural network(ANN)model is developed to carefully design the phase distribution of each LC hologram.With the advantage of high security,high capacity and simple configuration,our optical secret sharing framework has great potentials in optical encryption and dynamic holographic display.

关 键 词：holographic encryption optical secret sharing cascaded liquid crystal hologram multi-dimensional multiplexing 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构] O438.1[自动化与计算机技术—计算机科学与技术]