Sally Cole Johnson

Senior Technical Editor
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Sally Cole Johnson, Laser Focus World’s senior technical editor, is a science and technology journalist who specializes in physics and semiconductors. She wrote for the American Institute of Physics for more than 15 years, complexity for the Santa Fe Institute, and theoretical physics and neuroscience for the Kavli Foundation.

(Photo credit: Besim Mazhiqi, PHoQS, Paderborn University)
Test & Measurement

New tool determines characteristics of light-based quantum states

May 6, 2024
Researchers develop a technique to measure the quantum mechanical properties of electromagnetic fields at the single-photon level.
(Image credit: Zhaoyang Li)
Optics

Hyperbolic mirrors enhance petawatt laser focus

May 2, 2024
Researchers discover single-wavelength focal spots can be achieved by combining a rotational hyperbolic mirror with a parabolic mirror for current femtosecond petawatt-class lasers...
(Image credit: Stefano Bonetti)
Lasers & Sources

Laser light unleashes quantum behavior at room temperature

May 1, 2024
Researchers discover a large class of materials can be made magnetic via laser light—at room temperature—and it opens a new pathway to designing materials with light.