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    • D. Jason Palmer

    Freelance writer

    D. Jason Palmer is a freelance writer based in Florence, Italy.

    (Courtesy of Cun-Zheng Ning)
    A photograph (a) shows native light emission from a heterostructure nanosheet in which spontaneous emission comes more or less uniformly from the entire sheet. A second photograph (b) under lasing condition shows that lasing modes are guided along the nanosheet; light is mostly visible from the edge of the nanosheets, indicating that guided modes are scattered off the edge. A schematic shows modes being guided along the nanosheet, forming two parallel cavities for the two colors (c).
    Lasers & Sources

    SEMICONDUCTOR LASERS: Two-color ‘nanosheet’ lasers light the way for displays and illumination

    D. Jason Palmer
    June 5, 2013
    The quest for laser-based broadband emitters for lighting and other applications has received a boost, with researchers at Arizona State University unveiling a single, nanoengineered...
    (Courtesy of RAL Space)
    Researcher Ali Hussain adjusts a dual-laser setup that measures isotope ratios. Designed for use on Mars, the system is being adapted to measure samples of common foods to pinpoint their geographic origin.
    Research

    SPECTROSCOPIC ANALYSIS: Laser for Mars aims to spot counterfeit foods on Earth

    D. Jason Palmer
    April 8, 2013
    A laser system originally developed to investigate the prospect of past life on Mars could be on its way to proving the provenance of your olive oil.
    (Courtesy of ORC)
    A dual-core fiber is shown in a schematic (a), as a preform (b), and as a finished fiber in scanning electron micrographs (c) and (d).
    Fiber Optics

    SPECIALTY FIBERS: Dual-core fiber has nanomechanical switching properties

    D. Jason Palmer
    Feb. 12, 2013
    Researchers at the University of Southampton (Southampton, England) have shown off a novel dual-core fiber architecture that permits changes in the coupling between the cores,...