High-orthogonality random meta-channels encode data optically into both physical and phase modulated virtual layers

https://www.eurekalert.org/news-releases/1068022 

"metasurfaces enhance physical layer spatial resolution... holographic images reconstructed in virtual layers... channel high spatial orthogonality/ randomly distributed apertures reduces crosstalk between stored images, by:ensuring no spatial overlap between pixels in different channels, randomly locating pixels within each channel to avoid high-order diffractions, encoding a holographic phase in each pixel to guide light for interference... st2.5 Tbit cm⁻³ storage density can be enhanced by increasing number of virtual layers"