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    • Paul Grad

    Freelance writer

    Paul Grad is a freelance writer based in Sydney, Australia.

    (Courtesy of the University of New South Wales)
    A normal single-mode fiber and a photonic-crystal fiber (cross section, lower right) are spliced together, forming a spherical microcavity at their junction that functions as a strain sensor (the photonic-crystal fiber collapses and becomes solid).
    Research

    FIBER SENSORS: In-fiber microcavity acts as strain sensor

    Paul Grad
    Sept. 1, 2008
    Researchers Gang-Ding Peng from the University of New South Wales (Sydney, Australia) and Enbang Lin and Xin Ding from Tianjin University (Tianjin, China) have developed a fiber...
    (Courtesy of Australian National University, Canberra)
    FIGURE 1. A nonlinear tunable metamaterial (for microwaves) is based on a series of printed-circuit boards with split-ring resonators and wires arranged to form a superlattice.
    Optics

    MATERIALS RESEARCH: Researchers demonstrate nonlinear tunable metamaterial

    Paul Grad
    June 1, 2008
    A research team at the Nonlinear Physics Centre of the Australian National University in Canberra, reports that it has produced the first nonlinear tunable metamaterial and, using...