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Superconducting photon number resolving counter for near infrared applications

机译:适用于近红外应用的超导光子数解析计数器

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摘要

We present a novel concept of photon number resolving detector based on 120-nm-wide superconducting stripes made of 4-nm-thick NbN film and connected in parallel (PNR-SSPD). The detector consisting of 5 strips demonstrate a capability to resolve up to 4 photons absorbed simultaneously with the single-photon quantum efficiency of 2.5% and negligibly low dark count rate.
机译:我们提出了一种新概念的光子数分辨检测器,该检测器基于120 nm宽的超导带,该超导带由4 nm厚的NbN薄膜制成并并联连接(PNR-SSPD)。由5个条带组成的检测器具有分辨多达4个光子同时被吸收的能力,单光子量子效率为2.5%,暗计数率低至可以忽略不计。

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