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arXiv 1504.02793physics.ins-det
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基于MoSi薄膜的高效超导纳米线单光子探测器

High-efficiency superconducting nanowire single-photon detectors fabricated from MoSi thin-films

V. B. Verma, B. Korzh, F. Bussières, R. D. Horansky, S. D. Dyer, A. E. Lita, I. Vayshenker, F. Marsili, M. D. Shaw, H. Zbinden, R. P. Mirin, S. W. Nam

摘要:

我们展示了由MoSi薄膜制备的高效率超导纳米线单光子探测器(SNSPD)。在0.7 K的温度下,在1542 nm处测得最大系统探测效率为87 ± 0.5%,抖动为76 ps,最大计数率接近10 MHz,偏振依赖性低至3.4 ± 0.7%。我们发现,在类似的低温下,MoSi SNSPD实现的效率与基于WSi的SNSPD相比,抖动减少了近两个因素。

英文摘要:

We demonstrate high-efficiency superconducting nanowire single-photon detectors (SNSPDs) fabricated from MoSi thin-films. We measure a maximum system detection efficiency (SDE) of 87 +- 0.5 % at 1542 nm at a temperature of 0.7 K, with a jitter of 76 ps, maximum count rate approaching 10 MHz, and polarization dependence as low as 3.4 +- 0.7 % The SDE curves show saturation of the internal efficiency similar to WSi-based SNSPDs at temperatures as high as 2.3 K. We show that at similar cryogenic temperatures, MoSi SNSPDs achieve efficiencies comparable to WSi-based SNSPDs with nearly a factor of two reduction in jitter.

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