Flat Lenses Made of Nanostructures Transform Tiny Cameras and Projectors

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.

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