IEEE Spectrum
•Technology
Technology
76% Informative
The metalens is a device developed at Harvard and commercial Projectors Metalenses re I am an applications engineer.
These nanostr today es use a phenomenon called metasurface optics to direct and focus light.
These lenses can be extremely thin—a few hundred micrometers thick, about twice the thickness of a human hair.
A metalens is a flat glass surface with a semicond two or three r on top.
Etched in the semiconductor is an array of pillars several hundred nanometers high.
These nanopillars can manipulate light waves with a degree of control not possible with traditional refractive lenses.
A 12-inch wafer can hold up to 10,000 metalenses.
Metalenses are less demanding to manufacture than even a simple microchip because they require only a single lithography mask as opposed to the dozens required by a microprocessor.
Unlike plastic lenses, metalenses can be made in the same foundries that produce the other chips destined for smartphones.
Future applications will take advantage of the technology’s ab today to detect polarized light. ›
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