Definition of "photodetector" []

• Any device used to detect electromagnetic radiation (noun)

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• "Intel has built a series of optical components from silicon and related materials, including a prototype avalanche photodetector it announced in December 2008."
• "IBM's advance involves a key component called an avalanche photodetector, which converts light into electricity."
• "The researchers say they used silicon and the element germanium to create an photodetector that is among the fastest and least power-hungry of its kind."