Superconducting image sensors based on current-biased kinetic inductance detectors

作者提出的电流偏动电感探测器（CB-KIDs）具有适合图像传感器的几个特征，尽管迄今为止已经证明了单个探测器的操作。在本研究中，我们尝试开发一种单片芯片，在该芯片上实现了由500个CB-KIDs组成的线性阵列和基于单通量量子（SFQ）电路的读出电路。为了抑制相邻两个检测器之间的干扰，我们在检测器之间放置了低通滤波器。当我们向芯片施加开关调制光信号时，观察到同步输出信号，表明线性阵列工作正确。我们将优化实际图像传感器的电路参数。

Current-biased kinetic inductance detectors (CB-KIDs) proposed by the authors have several features suitable for image sensors, though an operation of a single detector has been demonstrated so far. In this study, we tried to develop a monolithic chip on which a linear array composed of 500 CB-KIDs and a readout circuit based on the single flux quantum (SFQ) circuit are implemented. To suppress the interference between neighboring two detectors, we place low-pass filters between the detectors. When we apply an on-off modulated optical signal to the chip, a synchronized output signal is observed, suggesting that the linear array operates correctly. We will optimize circuit parameters for practical image sensors.