Terahertz spectral analysis by ac Josephson effect in high-Tc bicrystal junctions
Terahertz spectral analysis by ac Josephson effect in high-Tc bicrystal junctions
复制标题
高温双晶结中交流约瑟夫森效应的太赫兹光谱分析
DOI：
10.1109/77.919412
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发表时间：
2001
影响因子：
1.8
通讯作者：
K. Urban
中科院分区：
文献类型：
--
作者：
Y. Divin;O. Volkov;V. Pavlovskii;U. Poppe;K. Urban
基于集成到斯特林制冷机中的高T c约瑟夫森结的太赫兹希尔伯特变换频谱分析仪原型已经开发出来。研究了YBa 2Cu 3 O 7-x Josephson晶界结对频率f在60 ~ 5THz范围内的单色辐射的探测器响应。在30 ~ 85 K的任何工作温度范围内，在十倍光谱范围内观察到这些结对不同频率f辐射的响应ΔI（V）中电压V=hf/2 e附近的奇对称共振。用斯特林制冷机将结温从85 K降至30 K，可在20年的光谱范围内进行光谱分析。在低阻约瑟夫森结的太赫兹光谱分析中，分辨率δf/f = 10 - 3。作为该分析仪的应用实例，对远红外光泵CH 3 OH激光器的刺痛线操作进行了优化。
A prototype of a terahertz Hilbert-transform spectrum analyzer based on a high-T c Josephson junction integrated into a Stirling cooler has been developed. The detector response of YBa 2 Cu 3 O 7-x Josephson grain-boundary junctions to monochromatic radiation with the frequency f in the range from 60 GHz to 5 THz has been studied. Odd-symmetric resonances near the voltages V=hf/2e in the responses ΔI(V) of these junctions to radiation with different frequencies / have been observed in a decade of spectral range for any operating temperature between 30 to 85 K. Decreasing the junction temperature from 85 to 30 K by a Stirling cooler, the spectral analysis could be made in two decades of spectral range. A resolving power δf/f ∼ 10 -3 has been shown in the terahertz spectral analysis with the low-resistive Josephson junctions. As an example of application of this analyzer, an optimization of the tingle-line operation of a far-infrared optically-pumped CH 3 OH laser has been demonstrated.