Stacked metasurfaces use light and spacing to lock holographic data

Tokyo, Japan (SPX) Feb 04, 2026
A research team at Pohang University of Science and Technology (POSTECH) has demonstrated a secure holographic platform that encodes and reveals information using only the wavelength of light and the spacing between stacked metasurface layers. The approach targets the growing limitations of conventional digital security by shifting the encryption key from electronic code to the physical properti