Frequency-selective incoherent detection of terahertz radiation by high-Tc Josephson junctions
Frequency-selective incoherent detection of terahertz radiation by high-Tc Josephson junctions
复制标题
高温约瑟夫森结对太赫兹辐射的频率选择性非相干检测
DOI：
10.1063/1.126486
复制
发表时间：
2000
影响因子：
4
通讯作者：
V. Pavlovskii
中科院分区：
文献类型：
--
作者：
Y. Divin;U. Poppe;O. Volkov;V. Pavlovskii
The detector response of YBa2Cu3O7−x Josephson grain-boundary junctions to monochromatic radiation with the frequency f in the range from 60 GHz to 4 THz has been studied. Frequency-selective odd-symmetric resonances in the responses ΔI(V) of these junctions to radiation with different frequencies f have been observed near the voltages V=hf/2e in almost a decade of spectral range for any operating temperature in the range from 30 to 85 K. The spectral range of the selective detection has scaled with the IcRn product of the Josephson junction, reaching the range of 0.16–3.1 THz for a IcRn product of 1.5 mV. A resolving power δf/f of around 10−3 has been demonstrated in the selective detection by Josephson junctions. The high-frequency falldown of the amplitude of the selective response has been found to be proportional to exp[−P/P0], where P=(hf/2e)2/Rn is the power dissipated in the junction at the resonance and P0 is a characteristic power level. The values of P0 for our junctions were around 20 μW at 34...
