Patent ID: 6229154
Filing Date: 2001-05-08
Classification: G01J,H01L

Abstract:
A photo detecting element comprising:a photo detecting portion formed on a substrate, said photo detecting portion defining a multilayered structure including one or more ferromagnetic thin film layers each having the same first thickness, one or more high temperature superconducting thin film layers each having the same second thickness and one or more insulating thin film layers each having the same third thickness, andelectrodes connected to the photo detecting portion;wherein each of said one or more ferromagnetic thin film layers is transparent to incident light;wherein said first thickness is substantially thinner than said second thickness and said third thickness is substantially thinner than said first thickness; andwherein said multilayered structure is so assembled that (i) said one or more ferromagnetic thin film layers and said one or more high temperature superconducting thin film layers are disposed in alternating relationship relative to each other, and (ii) an insulating thin film layer is interposed between each ferromagnetic thin film layer and each high temperature superconducting thin film layer such that said ferromagnetic and said high temperature superconducting thin film layers are disposed so close to each other that magnetism from said one or more ferromagnetic thin film layers can elongate a relaxation time during which quasi-particles are generated from cooper pairs by the effect of incident light and are then recombined to form cooper pairs in said one or more high temperature thin film layers.