论文标题
通过使用可变的厚度，增强具有高填充因子的超导纳米线检测器的性能
Enhancing the Performance of Superconducting Nanowire-Based Detectors with High-Filling Factor by Using Variable Thickness
论文作者
论文摘要
当前的超导纳米线单光子探测器的弯曲是限制具有较大填充因子的曲折探测器的性能的主要因素之一。在本文中，我们提出了一个新概念，以减少当前拥挤效应的影响，这是一个所谓的可变厚度SNSPD，该厚度由两个厚度不同的区域组成。与直纳米线截面的厚度相比，弯曲的厚度较大，可以降低电流密度并减少由电流拥挤引起的临界电流的抑制。与标准均匀厚度SNSPD相比，可变厚度SNSPD具有更高的临界电流，提高的检测效率，并降低了黑暗计数速率，并具有相同的几何形状和膜质量。
Current crowding at bends of superconducting nanowire single-photon detectors is one of the main factors limiting the performance of meander-style detectors with large filling factors. In this paper, we propose a new concept to reduce influence of the current crowding effect, a so-called variable thickness SNSPD, which is composed of two regions with different thicknesses. A larger thickness of bends in comparison to the thickness of straight nanowire sections locally reduces the current density and reduces the suppression of the critical current caused by the current crowding. This allows variable thickness SNSPD to have a higher critical current, an improved detection efficiency, and decreased dark count rate in comparison with a standard uniform thickness SNSPD with an identical geometry and film quality.
