Combining speed with incredible precision, a team of Molecular Foundry scientists and industry users developed a way to print extremely small devices on the tip of a glass fiber as thin as a human hair. These tiny devices precisely squeeze and manipulate light in ways that are unachievable by conventional optics. The team’s approach, called fiber nanoimprinting, builds tips 30 times faster than today’s sculpting approach. The scale-up path is to print many tips instead of sculpting individual tips.