Overlay accuracy — precise alignment ... method proposed by the UMass Amherst team involves placing specially designed concentric metalenses on chip surfaces. When illuminated with a laser ...

Laser alignment is tricky, but we’ve seen a few other solutions out there. For a more classic mechanism that traces the actual beam path with burn marks, have a look at [Stephen’s] method.

The method makes it easier to perform the ultra-precise laser alignment required to manipulate individual atoms. When individual atoms interact with each other, they often exhibit unusual behavior ...