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arXiv 1302.2852physics.ins-det
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超导纳米线单光子探测器的高计数率读出

Readout of superconducting nanowire single-photon detectors at high count rates

Andrew J. Kerman, Danna Rosenberg, Richard J. Molnar, Eric A. Dauler

摘要:

超导纳米线单光子探测器与其他光子计数技术的区别首先在于其极高的速度,具有几十ps的定时分辨率和探测事件后10 ns的恢复时间$τ_R\lesssim$。然而,在这项工作中,我们确定在传统的电读出方案之间的非线性相互作用的检测器和它的读出,可以使稳定,高效率的操作不可能在计数率,甚至一个数量级小于$τ_R^{-1}$。我们提出了详细的实验证实这一点,和一个理论模型,定量地解释我们的观察。最后,我们描述了一种改进的读出,它规避了这个问题,允许这些检测器在高计数率下稳定地操作,检测效率的惩罚纯粹由它们的感应复位时间决定。

英文摘要:

Superconducting nanowire single-photon detectors are set apart from other photon counting technologies above all else by their extremely high speed, with few-ten-ps timing resolution, and recovery times $τ_R\lesssim$10 ns after a detection event. In this work, however, we identify in the conventional electrical readout scheme a nonlinear interaction between the detector and its readout which can make stable, high-efficiency operation impossible at count rates even an order-of-magnitude less than $τ_R^{-1}$. We present detailed experimental confirmation of this, and a theoretical model which quantitatively explains our observations. Finally, we describe an improved readout which circumvents this problem, allowing these detectors to be operated stably at high count rates, with a detection efficiency penalty determined purely by their inductive reset time.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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