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Nanoholes in Silicon Bolster Photodetector Speed, Efficiently

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A photodetector that could move more data at a lower cost has been built by propagating photons through nanoholes in a silicon wafer. The detector uses tapered holes to divert photons sideways, preserving both the speed of thin-layer silicon and the efficiency of a thicker layer. Photodetectors for optical to electronic signal conversion usually make use of efficient, but expensive materials other than silicon. A new approach uses tapered holes in silicon to trap photons and send them sideways through a silicon wafer, boosting efficiency. The approach allows high-efficiency, high-speed...Read full article

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    Published: April 2017
    Glossary
    integrated optics
    A thin-film device containing miniature optical components connected via optical waveguides on a transparent dielectric substrate, whose lenses, detectors, filters, couplers and so forth perform operations analogous to those of integrated electronic circuits for switching, communications and logic.
    photonic crystals
    Photonic crystals are artificial structures or materials designed to manipulate and control the flow of light in a manner analogous to how semiconductors control the flow of electrons. Photonic crystals are often engineered to have periodic variations in their refractive index, leading to bandgaps that prevent certain wavelengths of light from propagating through the material. These bandgaps are similar in principle to electronic bandgaps in semiconductors. Here are some key points about...
    Research & TechnologyeducationBusinessAmericasSensors & DetectorsWaferssiliconCommunicationsOpticsintegrated opticsphotonic crystalssilicon photonicsslow lightTech Pulse

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