Nanowerk September 26, 2022
The precise control of phase, amplitude, polarization, metasurface holography provides a flexible platform for light modulation, optical encryption. The process of image reconstruction by single pixel imaging is similar to a form of encoding and decoding, which is realized by calculating the correlation between a series of modulation patterns and their corresponding intensity signals. Researchers in China proposed an optical encryption scheme based on spatial multiplexing metasurface, which depends on the combination of holographic technology and single pixel imaging technology. In the encryption scheme, the image transmitted by single pixel imaging based on metasurface was used as the addressing key of holography. By illuminating different positions of the metasurface it can generate different holographic reconstructed images. There is 50% information overlap between adjacent sub-holograms. According to the researchers making use of the spatial multiplexing property of metasurface different functions could be completed paving the way for the applications in the field of optical imaging encryption and information security…read more. TECHNICAL ARTICLEÂ