Physicists and materials scientists have developed a compact optical device containing vertically stacked metasurfaces that can generate microscopic text and full-color holograms for encrypted data storage and colour displays.
A research team in the Advanced Design and Manufacturing for Vehicle Body from the College of Mechanical and Vehicle Engineering in China implemented a 3-D integrated metasurface device to facilitate miniaturization of the above. Using metasurfaces with ultrathin and compact characteristics, the research team designed optical elements by engineering the wavefront of light. The metasurfaces possessed great potential to integrate multiple functions into the miniaturized optoelectronic systems. The work is now published in Light: Science & Applications.Read more: https://phys.org/news/2019-10-d-metasurfaces-stacking-holography.html