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.

(Image credit: Ryoichi Horisaki/The University of Tokyo)
Detectors & Imaging

Full-color 3D layered holographic images via iPhone?

May 8, 2024
Researchers in Japan devise a three-dimensional (3D) full-color display method that relies on an iPhone, rather than a laser, to create holographic images—and it may prove useful...
(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...