Single metasurface encodes 36 high-resolution images at 20 nm intervals plus 8 from visible to near-IR using silicon nitride meta-atom pillars

https://www.eurekalert.org/news-releases/1085199

"fine control of light on metasurface... ability to project entirely different images depending on light's: wavelength (color)/ spin (polarization direction)... for example, left-circularly polarized red light may reveal an apple image, while right-circularly polarized red light a car image... simplified design/ fabrication, enhanced image quality... noise suppression algorithm... multiplexed spin/ wavelength information through single phase-optimization... high-capacity optical data storage, secure encryption, multi-image display"