• Sally Cole Johnson

    Editor in Chief
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    Sally Cole Johnson, Laser Focus World’s editor in chief, 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.

    A new route to chaos: Starting from a subharmonic frequency (the single peak), sidebands emerge as the control parameters is tuned (the modulated subharmonic state). Many frequencies form a very broad spectrum, which indicates chaos is being generated.
    Sally Cole Johnson
    April 4, 2025
    An unexpected modulated subharmonic route to chaos via a breathing soliton laser discovered by an international team of scientists extends laser chaos from Maxwell-Bloch equations...
    The team—left to right: Qinmiao Chen, Randy Stefan Tanuwijaya, Jensen Li, and Tailin An—with their optical setup.
    Sally Cole Johnson
    March 28, 2025
    Quantum optics and advanced nanophotonics combo enables precise control of entangled holographic information.
    Credit: Milad Abolhasani
    A new method to tune quantum dot bandgaps taps light—which speeds the process, and is more energy-efficient and environmentally sustainable. (Credit: Milad Abolhasani)
    Sally Cole Johnson
    March 26, 2025
    Existing methods to tune bandgaps of perovskite quantum dots—which are less than ideal because they rely on chemical modifications or high-temperature reactions—just got an environmenta...