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Coloquio de Física - Wrapping light around a hair

   Departamentos        Ciencias - Sección Física

Ponente: Eric Mazur (Harvard University) Can light be guided by a fiber whose diameter is much smaller than the wavelength of the light? Can we mold the flow of light on the micrometer scale so it wraps, say, around a hair? Until recently the answer to these questions was "no". We developed a technique for drawing long, free-standing silica wires with diameters down to 50 nm that have a surface smoothness at the atomic level and a high uniformity of diameter. Light can be launched into these silica nanowires by optical evanescent coupling and the wires allow low-loss single-mode operation. They can be bent sharply, making it possible to control the propagation of light around micrometer-sized corners. The nanowires have applications in microphotonic devices for optical processing and environmental sensing.

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  16 de Marzo de 2017      01h 18m

  wrapping   light   fisica   coloquio   2017   optica   fibra   luz   

  https://www.facebook.com/coloquiosfisicapucp/

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