Measurement of the Spectral Response of Spiral-Antenna Coupled Superconducting Hot Electron Bolometers
Measurement of the Spectral Response of Spiral-Antenna Coupled Superconducting Hot Electron Bolometers
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螺旋天线耦合超导热电子测辐射热计光谱响应的测量
DOI：
10.1109/tasc.2013.2245173
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发表时间：
2013-02
影响因子：
1.8
通讯作者：
G. N. Goltsman
中科院分区：
文献类型：
--
作者：
K.M. Zhou;S.C. Shi;J.R. Gao;G. N. Goltsman
螺旋天线耦合的超导热电子测辐射热计（HEB）的测量光谱响应通常在仍处于感兴趣频率范围内的频率下急剧下降（例如，~ 5 THz）。这与来自相同测量的隐含的低接收器噪声温度不一致。为了理解这种差异，我们详尽地测试和校准傅里叶变换光谱仪测量中使用的热源。首先研究了高压汞灯的绝对发射光谱，然后以Martin-Puplett干涉仪为光谱仪，77 K黑体为宽带信号源，测量了两个螺旋天线耦合的NbN高电子束的光谱响应。测得的绝对发射光谱与频率成正比，对应的等效黑体温度分别为1 THz时4000 K、3 THz时1500 K和5THz时800 K。螺旋天线耦合的NbN HEB的测量光谱响应，校正空气吸收，在0.5-4 THz的频率范围内几乎是平坦的，与HEB和螺旋天线之间的模拟耦合效率一致。这些结果解释了这种差异，并证明螺旋天线耦合超导NbN HEBs在宽的频率范围内工作良好。此外，该校准方法和结果也可广泛应用于其他准光太赫兹接收机。
Measured spectral response of spiral-antenna coupled superconducting hot electron bolometers (HEBs) often drops dramatically at frequencies that are still within the frequency range of interest (e.g., ~ 5 THz). This is inconsistent with the implied low receiver noise temperatures from the same measurements. To understand this discrepancy, we exhaustively test and calibrate the thermal sources used in Fourier transform spectrometer measurements. We first investigate the absolute emission spectrum of high-pressure Hg arc lamp, then measure the spectral response of two spiral-antenna coupled NbN HEBs with a Martin-Puplett interferometer as spectrometer and 77 K blackbody as broadband signal source. The measured absolute emission spectrum of Hg arc lamp is proportional to frequency, corresponding to an equivalent blackbody temperature of 4000 K at 1 THz, 1500 K at 3 THz, and 800 K at 5 THz, respectively. Measured spectral response of spiral-antenna coupled NbN HEBs, corrected for air absorption, is nearly flat in the frequency range of 0.5-4 THz, consistent with simulated coupling efficiency between HEB and spiral-antenna. These results explain the discrepancy, and prove that spiral-antenna coupled superconducting NbN HEBs work well in a wide frequency range. In addition, this calibration method and these results are broadly applicable to other quasi-optical THz receivers.
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DOI：
10.1109/tmtt.2006.889153
发表时间：
2007-02
影响因子：
4.3
作者：
A. Semenov;H. Richter;H. Hubers;B. Gunther;A. Smirnov;K. Il'in;M. Siegel;J. Karamarković
通讯作者：
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10.1016/0020-0891(67)90027-9
发表时间：
1967-03
期刊：
Infrared Physics
影响因子：
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R. Cano;M. Mattioli
影响因子：
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作者：
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通讯作者：
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影响因子：
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DOI：
10.1016/j.phpro.2012.06.169
发表时间：
2012
期刊：
Physics Procedia
影响因子：
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作者：
W. Zhang;W. Miao;Q. Yao;Z. H. Lin;S. Shi;J. Gao;G. Gol’tsman
通讯作者：
W. Zhang;W. Miao;Q. Yao;Z. H. Lin;S. Shi;J. Gao;G. Gol’tsman