高温超导GdBa_2Cu_3O_(7-δ)薄膜双晶晶界结及光探测器  

Bicystal Junctions and Optical Detectors in HTSC GdBa2Cu3O7-5 Thin Films

作　　者：姚久胜[1,2] 王瑞兰[1,2] 宣毅[1,2] 李宏成[1,2] 周燕 樊江水[1,2] 万云 

机构地区：[1]中国科学院物理研究所国家超导实验室 [2]西北大学物理系

出　　处：《激光与红外》1998年第2期104-106,共3页Laser & Infrared

摘　　要：在晶界夹角为２４°的Ｚｒ（Ｙ）Ｏ２人工双晶基片上制备高温超导双晶Ｇｄ－Ｂａ２Ｃｕ３Ｏ７－δ薄膜，用光刻技术在晶界上刻出１０×１０ｍ２的双晶晶界结，它与外电路一起构成光探测器。在８０Ｋ用Ｈｅ－Ｎｅ激光和５００Ｋ黑体作为辐射源测量了光探测器的响应特性。探测结果：噪声等效功率ＮＥＰ分别为６．７×１０－１４和３．８×１０１４ＷＨｚ－１／２，归一化探测率分别为１．４×１０１０和２．６×１０１０ｃｍＨｚ１／２Ｗ－１；响应度分别为１．８×１０７和３．２×１０７ＶＷ－１。The artificial bicrystal grain boundary junctions in GdBa2Cu3O7- thin films were fabricat- ed on Zr(Y )O2 bicrystal substrates with misorienta- tion of 24. The samples were patterned using ordi-nary photolithography. The constricted part was 1 0× 10m2. These junctions were used as optical de- tectors. The optical response characteristics of the detectors for He - Ne laser and 500K blackbody ir- radiation were measured at 80K. The detecting re- sults are as follows : Noise equivalent power (NEP) is 6. 7×10-14 and 3. 8× 10-14 WHz-1/2 ;the normal- ized detectivities (D ) is 1. 4×1010 and 2. 6×1010 cmHz1/2 W-1; the voltage responsivities (Rv ) is 1. 8 ×107 and 3. 2×107VW-1.

关 键 词：高温超导体 非平衡态 探测器 晶界 

分 类 号：TM26[一般工业技术—材料科学与工程] TN215[电气工程—电工理论与新技术]