Photodetector Construction (IMAGE)

Duke University

Photodetector Construction

Caption

The new photodetectors allowing multispectral cameras with unprecedented frequency range are built from three layers. The size and spacing of silver nanocubes on a thin layer of gold dictates what frequency they absorb, causing them to heat up. A thin layer of a pyroelectric material called aluminum nitride then converts the heat to an electric signal, which is picked up and carried by a layer of silicon semiconductor on bottom.

Credit

Jon Stewart, Duke University

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