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Ultrasonic Waves Create One-Way Optical Fiber

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Ultrasonic waves can turn optical fiber into a one-way street for photons, a discovery that could aid the development of quantum computers. Researchers from the University of Illinois at Urbana-Champaign demonstrated the effect using a silica resonator adjacent to a microfiber. At its root is the “acousto-optic interaction of light with long-lived propagating phonons” in the resonator, the researcher wrote in a study published in Nature Physics (doi: 10.1038/nphys3236). Called Brillouin scattering-induced transparency (BSIT), the phenomenon permits light to travel in...Read full article

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    Published: January 2015
    Glossary
    brillouin scattering
    Brillouin scattering is a phenomenon in physics where an incident electromagnetic wave (usually light) interacts with acoustic phonons (quantized lattice vibrations) in a material, resulting in the scattering of the incident light. This phenomenon is named after the French physicist Leon Brillouin, who made significant contributions to the understanding of wave interactions in crystals. There are two main types of Brillouin scattering: Stimulated Brillouin scattering: In SBS, an incident...
    Research & TechnologyAmericasIllinoisUniversity of IllinoisUrbana-ChampaignJunHwan KimGaurav Bahlsoundfiber opticsBrillouin scatteringTech Pulse

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