论文标题
带有超导纳米线的单光子检测器的时间阵列用于光子数分辨率
Temporal array with superconducting nanowire single-photon detectors for photon-number-resolution
论文作者
论文摘要
我们介绍了16个元素，时间阵列，光子数解（PNR）检测器的实验实现，该探测器是一个多路复用的单光子检测器，该检测器将输入信号拆分在多个时键上，并使用两个超导纳米电磁单光子检测器（SNSPD）检测到时间键。对检测器的PNR功能进行了理论研究，得出的结论是，与单光子检测器相比，我们的阵列检测器可以解决一个平均光子数量较高的一个数量级，鉴于要测量的输入脉冲数量相同。该声明经过实验验证，我们表明检测器可以准确地预测$ 10^{ - 3} $至$ 10^{2} $之间的光子数。我们目前的检测器无法获得高精度的单发光子数测量，因为其有效量子效率为$ 49 \，\％$。使用具有较高量子效率的SNSPD，PNR性能将提高，但是光子数分辨率仍将受到阵列大小的限制。
We present an experimental realization of a 16 element, temporal-array, photon-number-resolving (PNR) detector, which is a multiplexed single-photon detector that splits an input signal over multiple time-bins, and the time-bins are detected using two superconducting nanowire single-photon detectors (SNSPD). A theoretical investigation of the PNR capabilities of the detector is performed and it is concluded that compared to a single-photon detector, our array detector can resolve one order of magnitude higher mean photon numbers, given the same number of input pulses to measure. This claim is experimentally verified and we show that the detector can accurately predict photon numbers between $10^{-3}$ to $10^{2}$. Our present detector is incapable of single-shot photon-number measurements with high precision since its effective quantum efficiency is $49\,\%$. Using SNSPDs with a higher quantum efficiency the PNR performance will improve, but the photon-number resolution will still be limited by the array size.
