Fiber-optic Communications

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Carla A


Date added:

March 7, 2013








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Microchips are made of semiconductors and a semiconductor is a band gap. A band gap makes is possible to control the flow of electricity in a chip. In order to make light chips, you need the photonic equivalent of silicon: a material that can trap light. "You need a way of trapping the light so there are no escape channels," says John...
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Diederik Wiersma and his colleagues used a powder of gallium arsenide. The laser could not penetrate a layer of powder even when the layer was less than a hundredth of an inch thick. It was indeed the very first time that anyone had trapped light, but as they knew, microchips cannot be made out of powder...
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