Characterization of a Photon-Number Resolving SNSPD Using Poissonian and Sub-Poissonian Light
Characterization of a Photon-Number Resolving SNSPD Using Poissonian and Sub-Poissonian Light
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DOI：
10.1109/tasc.2019.2905566
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发表时间：
2018-10
影响因子：
1.8
通讯作者：
E. Schmidt;E. Reutter;Mario Schwartz;H. Vural;K. Ilin;M. Jetter;P. Michler;M. Siegel
中科院分区：
文献类型：
--
作者：
E. Schmidt;E. Reutter;Mario Schwartz;H. Vural;K. Ilin;M. Jetter;P. Michler;M. Siegel
光子数分辨（PNR）单光子探测器在基于光子的量子技术的新兴领域中具有广泛的应用。特别是光子集成电路将为量子光子学的高复杂性和易用性铺平道路。超导纳米线单光子探测器（SNSPD）是特别感兴趣的，因为它们将高探测效率和高定时精度与高计数率相结合，并且它们可以被配置为PNR-SNSPD。在这里，我们提出了一个PNR-SNSPD的四光子分辨率适合波导集成工作在4 K的温度。在光子通量小于5个光子/脉冲的泊松光源下，在900 nm和76 MHz的脉冲频率下，获得了较高的光子数统计精度，探测效率为22.7 ± 3%。我们证明了这样的检测器的能力，以区分一个子泊松从泊松光源。
Photon-number resolving (PNR) single-photon detectors are of interest for a wide range of applications in the emerging field of photon-based quantum technologies. Especially photonic integrated circuits will pave the way for a high complexity and ease of use of quantum photonics. Superconducting nanowire single-photon detectors (SNSPDs) are of special interest since they combine a high detection efficiency and a high timing accuracy with a high count rate and they can be configured as PNR-SNSPDs. Here, we present a PNR-SNSPD with a four photon resolution suitable for waveguide integration operating at a temperature of 4 K. A high statistical accuracy for the photon number is achieved for a Poissonian light source at a photon flux below 5 photons/pulse with a detection efficiency of 22.7 ± 3 % at 900 nm and a pulse rate frequency of 76 MHz. We demonstrate the ability of such a detector to discriminate a sub-Poissonian from a Poissonian light source.