| 高Tc超导薄膜约瑟夫逊结光探测研究 |
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| 引用本文： | 于明湘,张湘云.高Tc超导薄膜约瑟夫逊结光探测研究[J].光子学报,1997,26(8):720-723. |
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| 作者姓名： | 于明湘 张湘云 |
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| 作者单位： | [1]西北大学物理系 [2]山东大学电子系 |
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| 摘 要： | 我们研制了具有约瑟夫逊效应的高Tc GdBa2Cu3O7-薄膜双晶晶界结,对其交直流约瑟夫逊效应进行了观测,并用其进行光探测,用波长为0.6328μm的He-Ne激光器辐照双晶结结区,系统观测了双晶晶界结的光响应特性,得到的最好结果如下噪音等效功率NEP=1.9×10-13W,归一化探测率D=53×109cmHz1/2W-1,响应率Rv=4.2×107V/W,响应时间τ=4.35×10-7s.
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| 关 键 词： | Josephson效应 双晶结 光探测 |
| 收稿时间： | 1996-11-28 |
STUDY ON HIGH T_c SUPERCONDUCTING THIN FILM LIGHT DETECTOR WITH JOSEPHSoN JUNCTION |
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| Yu Mingxiang,Fan Jiangshui.STUDY ON HIGH T_c SUPERCONDUCTING THIN FILM LIGHT DETECTOR WITH JOSEPHSoN JUNCTION[J].Acta Photonica Sinica,1997,26(8):720-723. |
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| Authors: | Yu Mingxiang Fan Jiangshui |
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| Institution: | 1. Physics Department, Northwest University, Xi’an 710069;2. Department of Electronics, Shandong University, Ji’nan 250100;3. Xi’an Mining Institute, Xi’an 710054 |
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| Abstract: | The bicrystal granule boundary junctions that have Josephson effects were fabricated withhigh Tc superconducting GdBa2Cu3O7-8 thin film which was deposed on YSZ substrate.And the anglebetween the two granule boundaries are 24°.The DC and AC Josephson effects of junction have beenmeasured at liquid N2 temperature.The typical Josephson behaviour was shown clearly.The lightresponse characteristics of junction for He-Ne laser with 0.6328μm wave length were measured at77K.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. |
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| Keywords: | Josephson effects Bicrystal junction Light detect |
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