In this paper, we review the research and development of the fractal superconducting nanowire single-photon detectors (SNSPDs), including our demonstrations of high-performance devices and systems with over 80% system detection efficiency, negligibly low residual polarization sensitivity, and low timing jitter. Using the fractal SNSPDs, we demonstrate full-Stokes polarimetric imaging LiDAR.
In this paper, we review research progress on bio-fluorescence imaging and microscopy using Superconducting Nanowire Single-Photon Detectors (SNSPDs) and introduce the fractal SNSPDs that feature high detection efficiency, low polarization sensitivity, fast operating speed, high timing resolution, and broad-spectrum response. These combined merits make them ideal candidates for light sensors in bio-fluorescence imaging and microscopy.
This paper reviews some recent research progress in superconducting nanowire single-photon detectors (SNSPDs) at the infrared spectrum range, with particular emphasis on detection efficiency and timing jitter. For detection efficiency, we present fractal SNSPDs with reduced polarization sensitivity; for timing jitter, we present two mechanisms of device timing jitter – vortex-crossing-induced timing jitter and spatial-inhomogeneity-induced timing jitter.
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