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Friday, July 10, 2009

Pink Silicon Is the New Black

Black silicon can absorb light over a wider spectrum than can normal silicon--from low-frequency visible light through near- and short-wave-infrared wavelengths that would normally pass right through regular silicon. Another property, called photoconductive gain, gives black silicon much greater sensitivity to light. These properties have identified black silicon as a way to make smaller, cheaper, and lighter silicon-based light detectors and to replace more expensive materials used in infrared detectors found in fiber-optic links, security systems, and elsewhere.

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