Multiple degrees-of-freedom optical encryption via pixel-resolved vectorial holography
基于像素分辨矢量全息术的多自由度光学加密
画素分解ベクトルホログラフィーに基づく多自由度光暗号化
픽셀 해상도 픽터 홀로그래피를 통한 여러 자유도 광학 암호화
Cifrado óptico de múltiples grados de libertad mediante holografía vectorial con resolución de píxeles
Chiffrement optique à plusieurs degrés de liberté via holographie vectorielle à résolution de pixels
Оптическое шифрование с несколькими степенями свободы с помощью векторной голографии с разрешением пикселей
¹ State Key Laboratory of Radio Frequency Heterogeneous Integration & Key Laboratory of Optoelectronic Devices and Systems, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
中国 深圳 深圳大学物理与光电工程学院射频异质异构集成全国重点实验室与光电子器件与系统教育部重点实验室
² State Key Laboratory of Genome and Multi-omics Technologies, BGI Research, Shenzhen 518083, China
中国 深圳 华大生命科学研究院基因组多维解析技术全国重点实验室
Optical encryption is pivotal to modern information security, however, conventional techniques mainly rely on the conjugated Fourier-transform relation between recording phase and retrieval information, making them vulnerable to iterative decryption attack. Although the synergy of multiple degrees of freedom (DoFs), such as optical metasurface platforms, offers a potential solution, the pixel-scale localized encrypting specific to confidential information (e.g., letters or patterns) remains elusive. To address this issue, we propose the vectorial optical pen to sketch optical foci for achieving pixel-resolved vectorial holograms.
Moreover, the ciphertexts are simultaneously encoded by multiple DoFs, inherently resisting unauthorized access. Specifically, we convert the holographic plaintext (i.e., letters) to the ASCII codes for perfectly-matching the orthogonal polarization modes, yielding ultralow crosstalk and high security. The proposed dynamic and versatile system offers a practical route to high-capacity and high-confidentiality optical cryptography in the big-data era.
