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Angular Acceleration Observed in Helical Light Beams

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The orbital angular momentum of laser light traveling along a helical path through space can accelerate and decelerate as it spins into the distance. This is the first time that angular acceleration has been observed in light, according to a team of researchers from Africa and Germany. The phenomenon could lead to new applications in structured light fields, they said. By combining two structured light fields in the form of Bessel beams (a), the resulting beam (b) spins as it travels. The rate of spin can be controlled. Images courtesy of Andrew Forbes/Wits School of Physics. ...Read full article

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    Published: April 2015
    Glossary
    structured light
    The projection of a plane or grid pattern of light onto an object. It can be used for the determination of three-dimensional characteristics of the object from the observed deflections that result.
    Research & TechnologySouth AfricaUniversity of the WitwatersrandWits UniversityAndrew ForbesBasic ScienceLasersorbital angular momentumstructured lightTech Pulse

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