论文标题
演示热耦合的行柱SNSPD成像阵列
Demonstration of a Thermally-Coupled Row-Column SNSPD Imaging Array
论文作者
论文摘要
虽然单像素超导纳米线单光子检测器（SNSPD）表现出了从紫外线到近IR的出色效率和计时性能，但将这些设备缩放到大型成像阵列仍然具有挑战性。在这里，我们使用热耦合和阵列的两个光敏层之间的热耦合和检测相关性提出了一个新的SNSPD多路复用系统。使用此体系结构与一层以行和第二层为方向的通道一起演示了16像素阵列中的成像能力，并在几个光子级别上具有准确的点跟踪。我们还探讨了在平行和垂直于底层的顶层纳米线取向的性能权衡。热耦合的行柱方案很容易与现有读取系统相扩展到kilopixel大小，并且与其他多重架构结合使用时，有可能使Megapixel scale scale SNSPD成像阵列。
While single-pixel superconducting nanowire single photon detectors (SNSPDs) have demonstrated remarkable efficiency and timing performance from the UV to near-IR, scaling these devices to large imaging arrays remains challenging. Here, we propose a new SNSPD multiplexing system using thermal coupling and detection correlations between two photosensitive layers of an array. Using this architecture with the channels of one layer oriented in rows and the second layer in columns, we demonstrate imaging capability in 16-pixel arrays with accurate spot tracking at the few photon level. We also explore the performance tradeoffs of orienting the top layer nanowires parallel and perpendicular to the bottom layer. The thermally-coupled row-column scheme is readily able to scale to the kilopixel size with existing readout systems, and when combined with other multiplexing architectures, has the potential to enable megapixel scale SNSPD imaging arrays.
