高Tc超导薄膜双晶结光探测器  

High Tc Superconducting Thin Film Bicrystal Junction Light Beam Detector

作　　者：赵成东[1] 杨建清[1] 于明湘[1] 万发宝 平一梅[1] 王瑞兰[2] 宣毅[2] 李宏成[2] 

机构地区：[1]西北大学物理系,西安710069 [2]中国科学院物理研究所国家超导实验室,北京100080

出　　处：《低温与超导》1997年第2期49-52,共4页Cryogenics and Superconductivity

基　　金：国家自然科学基金

摘　　要：研制了具有约瑟夫逊弱连接行为的高TcGdBa2Cu3O7-δ双晶晶界结，并用双晶结进行光探测，用波长为0．6328μm的He－Ne激光器辐照双晶结区，系统观测了结的光响应特性，最好的结果为噪声等效功率NEP＝1．9×10－13W，归一化探测率D＝5．3×109cmHz1/2W－1，响应率Rv＝4．2×107V／W，响应时间τ=4.35×10-7s。The high Tc GdBa2Cu3O7-δbicrystal junctions with Josephson weak link behaviour have been fabricated successfully. The light detector was prepared with these bicrystal junctions. The light responser characteristic for He-Ne laser with 0. 6328μm wave length were measurement at 77K. The optimum results are as follows: NEP = 1. 9×10-13W,D = 5. 3×109cmHz1/2W-1, Rv = 4. 2×107V/W, τ =4. 35× 10-7s

关 键 词：双晶结 光探测 超导薄膜 高TC 光量子效应 

分 类 号：TM260.6[一般工业技术—材料科学与工程]