Detection of Pulsed Terahertz Waves Using High-Temperature Superconductor Josephson Junction
Detection of Pulsed Terahertz Waves Using High-Temperature Superconductor Josephson Junction
复制标题
DOI：
10.1143/apex.3.042701
复制
发表时间：
2010-04
影响因子：
2.3
通讯作者：
R. Kaneko;I. Kawayama;H. Murakami;M. Tonouchi
中科院分区：
文献类型：
--
作者：
R. Kaneko;I. Kawayama;H. Murakami;M. Tonouchi
报道了一种新型的高温超导约瑟夫森结太赫兹探测器。该探测器采用YBa_2Cu_3O_（7-δ）晶界结制作。利用飞秒光脉冲激发超快光电导天线产生的太赫兹脉冲辐射，观测到了清晰的太赫兹信号。通过改变太赫兹辐射源的泵浦功率和太赫兹偏振态等参数，研究了探测器的特性。结果表明，该探测器主要探测太赫兹电场。这是第一次使用高温超导约瑟夫森结检测脉冲太赫兹电场。
We report a novel terahertz (THz) detector with a high-Tc superconducting (HTS) Josephson junction. This detector was fabricated using a YBa2Cu3O7-δ grain boundary junction. Clear THz signals induced by THz-pulse radiation from an ultrafast photoconductive antenna excited by femtosecond optical pulses were observed. We investigated the characteristics of the detector by changing the parameters of THz radiation such as pump laser power for the THz emitter and THz polarization. The results indicate that the detector mainly detects the THz electric fields. This is the first demonstration of a detection of pulsed THz electric fields using an HTS Josephson junction.