Titanium Superconducting Photon-Number-Resolving Detector
Titanium Superconducting Photon-Number-Resolving Detector
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DOI：
10.1109/tasc.2010.2089953
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发表时间：
2011-06-01
影响因子：
1.8
通讯作者：
Zama, Tatsuya
中科院分区：
文献类型：
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作者：
Fukuda, Daiji;Fujii, Go;Zama, Tatsuya
利用钛基跃迁边缘传感器研制出了高效率的光子数分辨探测器。根据响应光子分布、暗计数和定时抖动对器件性能进行了评估。在光子统计分析中，观测到的探测概率符合泊松分布。通过测量的分布与理论的比较，得出了在850 nm处98%的探测效率。该器件的暗计数概率小于10(-6)，对应于0.6赫兹的暗计数速率。时序抖动为25 ns，是迄今报道的(据我们所知)用于光学光子测量的过渡边缘传感器的最佳值。
High-efficiency photon-number-resolving detectors have been developed using titanium-based transition-edge sensors. Device performances have been evaluated with respect to the response photon distribution, dark count, and timing jitter. In the analysis of the photon statistics, the observed detection probabilities were consistent with Poisson distributions. From a comparison of the measured distribution with theory, 98% detection efficiency was deduced at 850 nm. The dark count probability of the device is less than 10(-6), corresponding to a dark count rate of 0.6 Hz. The timing jitter is 25 ns, the best value ever reported (to our knowledge) in transition-edge sensors used for optical photon measurements.