高温超导YBCO颗粒膜桥型器件的8mm微波视频检测  

8mm MICROWAVE VIDEO DETECTION USING YBCO GRAULAR FILM BRIDGE DEVICE

作　　者：马海霞[1] 徐克西[1] 周世平 鲍家善[1] 

机构地区：[1]上海大学物理系,上海201800

出　　处：《低温物理学报》2000年第5期382-387,共6页Low Temperature Physical Letters

基　　金：上海市教委科学技术发展基金资助项目

摘　　要：在高温超导YBa2 Cu3O7-δ颗粒膜上刻成 0 .3× 0 .1mm2 的桥型样品 ,测量了它在 8mm微波辐照下的响应特性 .实验结果表明 :通过优化器件参数 ,响应率可达 10 4 V/W ,在T =70K时噪声等效功率为 5.2× 10 - 1 4 W /Hz1 / 2 ,当入射微波斩波频率为 50 0kHz时响应时间低于 3.9× 10 - 8s .YBa\-2Cu\-3O\-\{7- δ \} bridge junction with width 0.1mm and length 0.3mm is made by hand using a razor blade. Response charicteristics of microbridge junction is measured under external magnetic field and microwave irradition. By optimizing the device parameters, the detectivity of about 10\+4V/W is achievable, and the noise equivalent power (NEP) at T =70K is about 5.2×10\+\{-14\}W/Hz\+\{1/2\}, to identify the response time of the device, the response votage is measured with incident radiation chopped at 500kHz, and a rise time of less than 3.9×10\+\{-8\}s has been observed.

关 键 词：高温超导体 YBCO 颗粒膜 桥型器件 微波视频检测 

分 类 号：TM26[一般工业技术—材料科学与工程]