Title: Four-channel Imaging Based on Reconfigurable Metasurfaces: Hyperchaotic Encryption under Physical Protection Show Chinese title

Title: 基于可重构超表面的四通道成像：物理保护下的超混沌加密

Abstract: Metasurfaces facilitate high-capacity optical information integration by simultaneously supporting near-field nanoprinting and far-field holography on a single platform. However, conventional multi-channel designs face critical security vulnerabilities for sensitive information due to insufficient encryption mechanisms. In this work, we propose a four-channel phase-change metasurface featuring algorithm-physical co-security-a dual-protection framework combining intrinsic metasurface physical security with chaotic encryption. Our polarization-multiplexed metasurface generates four optical imaging channels through meta-atom design, including two far-field holograms and two near-field patterns. To enhance system security, we apply Chen hyperchaotic encryption combined with the Logistic map and DNA encoding to convert near-field information into secure QR codes; far-field holograms are retained to demonstrate the metasurface's information capacity and for attack detection. Phase-change metasurface further provides physical-layer security by dynamically switching imaging channels via crystalline-to-amorphous state transitions, enhancing anti-counterfeiting and reliability. The proposed metasurface achieves high-fidelity imaging, robust anti-attack performance, and independent channel control. This integrated approach pioneers a secure paradigm for high-density optical information processing. Show Chinese abstract

Abstract: 超表面通过在一个平台上同时支持近场纳米打印和远场全息术，促进了高容量的光学信息集成。 然而，传统的多通道设计由于加密机制不足，对敏感信息存在严重的安全漏洞。 在本工作中，我们提出了一种四通道相变超表面，具有算法-物理共安全的双保护框架，结合了固有超表面物理安全与混沌加密。 我们的偏振复用超表面通过元原子设计生成四个光学成像通道，包括两个远场全息图和两个近场图案。 为了增强系统安全性，我们将陈超混沌加密与Logistic映射和DNA编码相结合，将近场信息转换为安全的二维码；远场全息图被保留以展示超表面的信息容量并用于攻击检测。 相变超表面通过晶体到非晶态的转变动态切换成像通道，进一步提供物理层安全，提高防伪性和可靠性。 所提出的超表面实现了高保真成像、强大的抗攻击性能和独立的通道控制。 这种综合方法开创了高密度光学信息处理的安全范式。