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.
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).
