Ultrasensitive Quantum-Limited Far-Infrared STJ Detectors
Ultrasensitive Quantum-Limited Far-Infrared STJ Detectors
复制标题
超灵敏量子限制远红外 STJ 探测器
DOI：
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发表时间：
2007
影响因子：
1.8
通讯作者：
Edward J. Wollack
中科院分区：
文献类型：
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作者：
D. Prober;J. Teufel;C. Wilson;L. Frunzio;M. Shen;R. Schoelkopf;T. Stevenson;Edward J. Wollack
我们描述了最近在耶鲁大学超导隧道结（STJ）的直接探测器，已开发的亚毫米天文学的工作。为了监测具有大读出带宽和优异灵敏度的探测器的响应，我们使用了一种基于射频（RF）反射计的新型读出，就像为RF-SET发明的读出一样。为了校准探测器，我们开发了一种原位、片上、冷热光子源。这是一个电压偏置的金微桥。微桥发出的噪声通过共面带状线耦合到检测器。这提供了一个校准的黑体光子源与近单位耦合，快速斩波，和可计算的输出。我们提出了最近的检测结果在100-160 GHz的范围内。这些证明了预期的良好响应性、高灵敏度和快速响应。这种方法很容易与频率复用读出一起使用，从而节省了冷电子设备。极限灵敏度范围为1 × 10-19 W/（Hz）1/2。
We describe recent work at Yale on Superconducting Tunnel Junction (STJ) direct detectors that have been developed for submillimeter astronomy. To monitor the response of the detector with large readout bandwidth and excellent sensitivity, we use a novel readout based on radio frequency (RF) reflectometry, like the readout invented for the RF-SET. For calibration of the detector, we have developed an in-situ, on-chip, hot-cold photon source. This is a voltage biased gold microbridge. Noise emitted by the microbridge couples via a coplanar stripline to the detector. This provides a calibrated blackbody photon source with near unity coupling, fast chopping, and calculable output. We present recent detection results in the range 100-160 GHz. These demonstrate the expected good responsivity, high sensitivity, and fast response. This approach is easily used with a frequency-multiplexed readout, allowing economy of cold electronics. Ultimate sensitivity is in the range 1 times 10-19 W/(Hz)1/2.