PHOTODETECTOR
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United States of America Patent
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Issued Date -
Oct 30, 2014
app pub date -
Apr 23, 2014
filing date -
Apr 26, 2013
priority date (Note) -
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Abstract
A photodetector 1A comprises an optical element 10A for generating an electric field component in a predetermined direction when light is incident thereon along the predetermined direction, the optical element 10A having a structure including first regions and second regions periodically arranged with respect to the first regions along a plane perpendicular to the predetermined direction; and a semiconductor layer 40, arranged on the other side opposite from one side in the predetermined direction with respect to the optical element 10A, having a semiconductor multilayer body 42 for generating a current according to the electric field component; each end part on the other side of the second regions being located closer to the other side than is each end part on the other side of the first regions; each first region being made of a dielectric body having a refractive index greater than that of each second region.
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