New device can control light at unprecedented speeds
In a scene from "Star Wars: Episode IV - A New Hope," R2D2 projects a three-dimensional hologram of Princess Leia making a desperate plea for help. That scene, filmed more than 45 years ago, involved a bit of movie magic - even today, we don't have the technology to create such realistic and dynamic holograms. Generating a freestanding 3D hologram would require extremely precise and fast c