Dec 3, 2017 06:45 AM
https://www.technologyreview.com/s/60961...-the-same/
EXCERPT: Lenses are almost as old as civilization itself. The ancient Egyptians, Greeks, and Babylonians all developed lenses made from polished quartz and used them for simple magnification. Later, 17th-century scientists combined lenses to make telescopes and microscopes, instruments that changed our view of the universe and our position within it.
Now lenses are being reinvented by the process of photolithography, which carves subwavelength features onto flat sheets of glass. Today, Alan She and pals at Harvard University in Massachusetts show how to arrange these features in ways that scatter light with greater control than has ever been possible. They say the resulting “metalenses” are set to revolutionize imaging and usher in a new era of optical processing....
MORE: https://www.technologyreview.com/s/60961...-the-same/
EXCERPT: Lenses are almost as old as civilization itself. The ancient Egyptians, Greeks, and Babylonians all developed lenses made from polished quartz and used them for simple magnification. Later, 17th-century scientists combined lenses to make telescopes and microscopes, instruments that changed our view of the universe and our position within it.
Now lenses are being reinvented by the process of photolithography, which carves subwavelength features onto flat sheets of glass. Today, Alan She and pals at Harvard University in Massachusetts show how to arrange these features in ways that scatter light with greater control than has ever been possible. They say the resulting “metalenses” are set to revolutionize imaging and usher in a new era of optical processing....
MORE: https://www.technologyreview.com/s/60961...-the-same/