Forget big, curved, glass lenses. Thanks to this new technological breakthrough in optics, the lens of the future could be the size of a spec of glitter-and just as powerful.
In a report posted in Science Magazine, material scientists have found a way to replace glass lenses, like the ones used in cameras and microscopes, with ones made of flat “meta-surfaces”, which are lighter and smaller-like-way smaller. What are “meta-surfaces”? Well, they’re “specially designed two-dimensional arrays of nanometer-scale metallic antennas [that] may allow bulky optical components to be shrunk down to a planar device structure.” Duh. If that made no sense to you (you’re not alone), here’s a video that explains it more simply:
These “metalenses”, which focus light by arranging “tiny towers” of titanium dioxide in specific patterns, will be just 2mm across and thinner than a strand of human hair. And other than drastically reducing size, metalenses will do away with aberrations produced by spherical glass lenses.
Here’s what the senior author of the report, Harvard University’s Federico Capasso, told the BBC about the metalens: