TlBaCaCuO双晶结太赫兹混频检测器特性研究  

STUDY OF CHARACTERISTICS OF TLBACACUO BICRYSTAL JOSEPHSON JUNCTION THZ MIXER

作　　者：花涛[1] 许伟伟[2] 王青云[1] 余辉龙[1] 梁瑞宇[1] 沈卫康[1] 

机构地区：[1]南京工程学院通信工程学院,南京211167 [2]南京大学超导电子学研究所,南京210093

出　　处：《低温物理学报》2015年第3期174-178,共5页Low Temperature Physical Letters

基　　金：南京工程学院校级科研基金(批准号:YKJ201321;ZKJ201202;YKJ201322);南京大学电磁波先进调控技术开放课题(批准号:13004)资助的课题~~

摘　　要：铊钡钙铜氧(TlBaCaCuO)材料相比钇钡铜氧(YBaCuO)来讲,具有基本不与水气发生反应,稳定性高的优点.我们制备了TlBaCaCuO双晶结,用其代替YBaCuO双晶结进行了太赫兹信号的混频检测.对TlBaCaCuO与YBaCuO双晶结的R^T特性、超导临界电流、正常态电阻、特征电压等参数进行了比较,给出了两种双晶结在空气中的退化程度随时间的关系.TlBaCaCuO双晶结显著提高了高温超导太赫兹检测器的稳定性和使用寿命.Compared with YBaCuO,TlBaCaCuO has better performance as high stability and no reaction with water.In place of YBaCuO bicrystal Josephson junction,TlBaCaCuO bicrystal Josephson junction is prepared to make up THz mixer.The characteristics of TlBaCaCuO bicrystal junction and YBaCuO bicrystal junction are compared,such as R-T character,superconducting critical current,normal resistance,characteristic voltage,etc.The relationships between the degradation of junctions and the time in the air are also analysed.Using TlBaCaCuO bicrystal junction can significantly increase the stability performance and the usable life of THz mixer.

关 键 词：铊钡钙铜氧约瑟夫森双晶结 混频检测 太赫兹 稳定性 

分 类 号：O511.3[一般工业技术—材料科学与工程]