Reprogrammable meta-hologram for optical encryption

By Geyang Qu, Wenhong Yang, Q. Song, Yilin Liu, Cheng-Wei Qiu, Jiecai Han, Din Ping Tsai, S. Xiao. Nature Communications, 2020

324 citations recorded by the source corpus.

Meta-holographic encryption is a potentially important technique for information security. Despite rapid progresses in multi-tasked meta-holograms, the number of information channels available in metasurfaces is limited, making meta-holographic encryption vulnerable to some attacking algorithms. Herein, we demonstrate a re-programmable metasurface that can produce arbitrary holographic images for optical encryption. The encrypted information is divided into two matrices. These two matrices are imposed to the incident light and the metasurface, respectively. While the all-dielectric metasurface is static, the phase matrix of incident light provides additional degrees of freedom to precisely control the eventual functions at will. With a single Si metasurface, arbitrary holographic images and videos have been transported and decrypted. We hope that this work paves a more promising way to optical information encryption and authentication. Here, the authors demonstrate a re-programmable metasurface that can produce arbitrary holographic images for optical encryption. The encrypted information is divided into two matrices and defined to the incident laser to produce arbitrary holographic images.

Subfields: Atomic and Molecular Physics, and Optics, Computer Vision and Pattern Recognition, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/7cf8f1cc57b898f9fe43bc008a1a929771b7d1cf

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In Atomic and Molecular Physics, and Optics

1. Merouane Debbah
2. Chau Yuen
3. Chongwen Huang
4. Junsuk Rho

In Computer Vision and Pattern Recognition

1. Merouane Debbah
2. Chau Yuen
3. H. Vincent Poor
4. Junsuk Rho
5. Trevon Badloe

In Electronic, Optical and Magnetic Materials

1. Merouane Debbah
2. Chau Yuen
3. Junsuk Rho
4. Trevon Badloe

Citations in the corpus

• Tunable metasurfaces towards versatile metalenses and metaholograms: a review (2022, methodology): “SLMs have been used to produce reprogrammable metahologram encryption algorithms by manipulating the light sources.(140) The correct metaholographic image is only reconstructed when the incident light is modulated to a predesigned wavefront by the SLM, whereas a misleading image is shown for undesig”
• Photonic matrix multiplication lights up photonic accelerator and beyond (2022, methodology): “Then, a cylindrical lens pair was used to convert the Hermite – Gaussian mode into the Laguerre-Gaussian mode.”
• Holographic MIMO Communications: Theoretical Foundations, Enabling Technologies, and Future Directions (2022, methodology): “Optical encryption was realized by reprogrammable meta-hologram in [92].”