Photoconductive antenna, terahertz wave generating device, camera, imaging device, and measuring device

A photoconductive antenna adapted to generate terahertz waves when irradiated by pulsed light, the photoconductive antenna comprising:

• a first conductive layer made of a semiconductor material containing a first conductive type impurity;
• a second conductive layer made of a semiconductor material containing a second conductive type impurity different from the first conductive type impurity;
• a semiconductor layer positioned between the first conductive layer and the second conductive layer, and 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 a carrier density of the semiconductor material of the second conducive layer;
• a first electrode electrically connected to the first conductive layer;
• a second electrode electrically connected to the second conductive layer, and having an aperture through which the pulsed light passes;
• and
• a dielectric layer made of a dielectric material, and being 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.