| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a superconductive photodetector that solves a problem of a conventional technology, namely low light detection efficiency, and then has small polarization dependency and high light detection efficiency. <P>SOLUTION: In this superconductive photodetector, a plurality of superconductive thin lines of a meandering (meandering, lightning pattern, or zigzag) shape are installed via the front and back of a crystal substrate, insulating film, or adhesive so that the thin lines are close to each other and the directions of the thin lines are orthogonal to each other. As a result of to this arrangement and constitution, a photon that has not been detected because it has polarization rectangular to the first meandering thin line can be detected because it has polarization parallel to the next meandering thin line. In other words, any photon is decomposed into polarizations consisting of mutually rectangular straight lines, so that a photon having any polarization is detected. A failure due to polarization is eliminated thereby, so that the polarization dependency is small and the light detection efficiency is increased by about twice comparing with the conventional example. <P>COPYRIGHT: (C)2011,JPO&INPIT |
