Waveguide-integrated single- and multi-photon detection at telecom wavelengths using superconducting nanowires
Waveguide-integrated single- and multi-photon detection at telecom wavelengths using superconducting nanowires
复制标题
基于超导纳米线的电信波长波导集成单光子与多光子探测
DOI：
10.1063/1.4917166
复制
发表时间：
2015-04-13
影响因子：
4
通讯作者：
Pernice, Wolfram H. P.
中科院分区：
文献类型：
--
作者：
Ferrari, Simone;Kahl, Oliver;Pernice, Wolfram H. P.
我们研究单光子和多光子探测机制的超导纳米线探测器嵌入在氮化硅纳米光子电路。在近红外波长下，对于偏离临界电流的120 nm宽的纳米线，观察到最多三个光子的同时检测，而低于100 nm的窄纳米线提供有效的单光子检测。提出了一个理论模型，以确定不同的检测制度，并计算相应的内量子效率。预测的饱和的内部量子效率在单光子制度同意在高偏置电流下观察到的高原行为。(c)2015 AIP Publishing LLC.
We investigate single-and multi-photon detection regimes of superconducting nanowire detectors embedded in silicon nitride nanophotonic circuits. At near-infrared wavelengths, simultaneous detection of up to three photons is observed for 120 nm wide nanowires biased far from the critical current, while narrow nanowires below 100 nm provide efficient single photon detection. A theoretical model is proposed to determine the different detection regimes and to calculate the corresponding internal quantum efficiency. The predicted saturation of the internal quantum efficiency in the single photon regime agrees well with plateau behavior observed at high bias currents. (c) 2015 AIP Publishing LLC.