Photoconductive antenna, terahertz wave generating device, camera, imaging device, and measuring device
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United States of America Patent
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Apr 5, 2016
Grant Date -
Jun 20, 2013
app pub date -
Dec 18, 2012
filing date -
Dec 20, 2011
priority date (Note) -
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Abstract
A photoconductive antenna is adapted to generate terahertz waves when irradiated by pulsed light. The photoconductive antenna includes first and second conductive layers, a semiconductor layer positioned between the first and second conductive layers, first and second electrodes, and a dielectric layer. The semiconductor layer is made of a semiconductor material having a carrier density that is lower than a carrier density of the semiconductor material of the first conductive layer or the second conducive layer. The first and second electrodes are electrically connected to the first and second conductive layers, respectively. The second electrode has an aperture through which the pulsed light passes. The dielectric layer is made of a dielectric material, and is in contact with a surface of the semiconductor layer having a normal direction extending orthogonal to a lamination direction of the first conductive layer, the semiconductor layer, and the second conductive layer.
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