Photonic crystal bridge, SEM

Photonic crystal bridge, SEM

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Caption: Photonic crystal. Coloured scanning electron micrograph (SEM) of a one-dimensional photonic crystal bridge. The bridge is a waveguide, which can transmit information as light (photons). The regular spacing of holes creates a photonic crystal, in which light of a specific frequency cannot propagate. A defect (centre) has been created by leaving a larger gap between two holes. Photons of the specific frequency become trapped in this defect, which is known as a resonant cavity. This allows a specific frequency of light to be separated from mixed frequencies. This could find uses in optical computers. Work done at MIT, USA. Magnification: x3,050 at 6x7cm size. x11,000 at 7x10".

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Keywords: bridge, coloured, communications, computers, computing, defect, dimensionally, engineering, guide, light, micro, micromechanics, nano, nanotechnology, one, one-dimensional, optical, photonic crystal, photonics, physics, resonant cavity, scanning electron micrograph, sem, technological, technology, transmission, waveguide

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