Gigahertz counting rates of NbN single-photon detectors for quantum communications
Gigahertz counting rates of NbN single-photon detectors for quantum communications
复制标题
DOI：
10.1109/tasc.2005.849926
复制
发表时间：
2005-06
影响因子：
1.8
通讯作者：
A. Pearlman;A. Cross;W. Słysz;J. Zhang;A. Verevkin;Marc Currie;A. Korneev;P. Kouminov;K. Smirnov;B. Voronov;G. Goltsman;Roman Sobolewski
中科院分区：
文献类型：
--
作者：
A. Pearlman;A. Cross;W. Słysz;J. Zhang;A. Verevkin;Marc Currie;A. Korneev;P. Kouminov;K. Smirnov;B. Voronov;G. Goltsman;Roman Sobolewski
我们报告了纳米结构超导单光子探测器 (SSPD) 的 GHz 计数率和抖动。这些器件以 4 nm 厚、约 100 nm 宽的 NbN 蜿蜒条纹图案化，覆盖 10-/spl mu/m/spl 次/10-/spl mu/m 面积。我们能够以超过 2 GHz 的速率对可见光和红外电信波长的单光子进行计数，定时抖动低于 18 ps。我们还基于探测器光响应过程中相滑中心形成机制中的时滞效应，提出了 SSPD 切换动力学和抖动起源的模型。随着我们的读出电子设备的进一步改进，我们预计我们的 SSPD 将达到高达 10 GHz 的计数率。还提出了一种基于两个光纤耦合 SSPD 并在 1550 nm 波长下工作的集成量子通信接收器。
We report on the GHz counting rate and jitter of our nanostructured superconducting single-photon detectors (SSPDs). The devices were patterned in 4-nm-thick and about 100-nm-wide NbN meander stripes and covered a 10-/spl mu/m/spl times/10-/spl mu/m area. We were able to count single photons at both the visible and infrared telecommunication wavelengths at rates of over 2 GHz with a timing jitter of below 18 ps. We also present the model for the origin of the SSPD switching dynamics and jitter, based on the time-delay effect in the phase-slip-center formation mechanism during the detector photoresponse process. With further improvements in our readout electronics, we expect that our SSPDs will reach counting rates of up to 10 GHz. An integrated quantum communications receiver based on two fiber-coupled SSPDs and operating at 1550-nm wavelength is also presented.