Photonics Focus Magazine Vol. 4 Issue 2

March/April 2023 | Vol. 4 | Issue 2

This issue of Photonics Focus explores modern metrology, from the extraordinary precision of next-generation optical clocks, to the exquisitely sensitive mechanisms that allow scientists to detect gravitational waves originating from the collision of black holes. We look, too, at semiconductor lithography that has etch patterns so incredibly small fabricators must rely on advanced metrology instruments to find hidden defects.

SPIE Members can download full PDFs of this and past issues from our issue archive: 

Go to archive

About SPIE

Launched in 2020, Photonics Focus® is the award-winning society magazine of SPIE. Articles showcase scientific discovery and innovative real-world applications of optics and photonics.

A subscription to Photonics Focus is included in SPIE Membership, or you can purchase an annual print subscription (6 issues per year) without membership for $29.95:

Recent Issues
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research