高温超导直接检测器及其性能研究
发布时间：2019-01-01 19:36
【摘要】：基于约瑟夫森结而开发的高温超导直接检测器无需本振,具有便捷、灵敏度高的优点。高温超导直接检测器因其重要的研究意义和价值受到人们广泛的关注。由于THz波的能量低,在大气中传输受到水分的影响衰减较大,提高高温超导直接检测器的性能是一个十分有益的工作。我们在前人的基础上,对器件的研制与系统的优化进行了更进一步的研究,主要的工作如下：(1)设计研制了测量超导薄膜的电阻随温度(RT)变化特性的测试盒,此测试盒温度变化均匀,测量稳定性高,提高了薄膜RT测试的效果。(2)在研制小型高温超导直接检测器中,承担了滤波电路设计。在新的RC滤波电路中采用一个大电容(O.1uF)并联一个小电容(10pF)的滤波方式,实验结果证明,这样可以有效地同时滤除因各种不可控因素引起的高频干扰和低频干扰。(3)优化后的超导直接检测器系统在0.1～2.5THz范围内,可以对多个太赫兹源的频谱测量。同时研究了超导检测器各部件的关联与影响及不同的工作参数对频谱线宽的影响。
[Abstract]:The HTS direct detector based on Josephson junction has the advantages of convenience and high sensitivity. High-temperature superconducting direct detectors (HTS) have attracted wide attention because of their important research significance and value. Because of the low energy of THz wave, the propagation in the atmosphere is attenuated by the influence of water, so it is very useful to improve the performance of HTS direct detector. On the basis of previous studies, we further study the device development and system optimization. The main work is as follows: (1) A test box is designed to measure the resistance of superconducting film with temperature (RT). The temperature variation of the test box is uniform and the measurement stability is high. (2) in the development of the small HTS direct detector, the filter circuit is designed. In the new RC filter circuit, a large capacitance (O.1uF) parallel to a small capacitance (10pF) filter is adopted. The experimental results show that, In this way, the high frequency interference and low frequency interference caused by various uncontrollable factors can be effectively filtered simultaneously. (3) the optimized superconducting direct detector system can be used to measure the spectrum of multiple terahertz sources in the 0.1~2.5THz range. At the same time, the correlation and influence of various components of superconducting detector and the influence of different operating parameters on spectrum linewidth are studied.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN06
本文编号：2398022
[Abstract]:The HTS direct detector based on Josephson junction has the advantages of convenience and high sensitivity. High-temperature superconducting direct detectors (HTS) have attracted wide attention because of their important research significance and value. Because of the low energy of THz wave, the propagation in the atmosphere is attenuated by the influence of water, so it is very useful to improve the performance of HTS direct detector. On the basis of previous studies, we further study the device development and system optimization. The main work is as follows: (1) A test box is designed to measure the resistance of superconducting film with temperature (RT). The temperature variation of the test box is uniform and the measurement stability is high. (2) in the development of the small HTS direct detector, the filter circuit is designed. In the new RC filter circuit, a large capacitance (O.1uF) parallel to a small capacitance (10pF) filter is adopted. The experimental results show that, In this way, the high frequency interference and low frequency interference caused by various uncontrollable factors can be effectively filtered simultaneously. (3) the optimized superconducting direct detector system can be used to measure the spectrum of multiple terahertz sources in the 0.1~2.5THz range. At the same time, the correlation and influence of various components of superconducting detector and the influence of different operating parameters on spectrum linewidth are studied.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN06
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本文编号：2398022
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