Laser-lithographically written micron-wide superconducting nanowire single-photon detectors

Lithium-Niobate-on-Insulator Waveguide-Integrated Superconducting Nanowire Single-Photon Detectors

We demonstrate waveguide-integrated superconducting nanowire single-photon detectors on thin-film lithium niobate (LN). Using a 250 um-long NbN superconducting nanowire lithographically defined on top of a 125 um-long LN nanowaveguide, on-chip detection efficiency of 46% is realized with simultaneous high performance in dark count rate and timing jitter. As LN possesses high second-order nonlinear \c{hi}(2) and electro-optic properties, an efficient single-photon detector on thin-film LN opens up the possibility to construct small scale fully-integrated quantum photonic chip which includes sin…

使用硅化钨超导纳米线探测器实现波长高达10微米的中红外单光子探测

Single-photon detection in the mid-infrared up to 10 micron wavelength using tungsten silicide superconducting nanowire detectors

本文研制WSi超导纳米线单光子探测器，在10 μm波长实现饱和内部探测效率，为中红外化学传感、LIDAR、暗物质搜寻及系外行星光谱学提供低暗计数、高稳定方案。

Superconducting Nanowire Single-Photon Detectors and effect of accumulation and unsteady releases of excess energy in materials

Universal fault-tolerant quantum computers, which promise to revolutionize computing, are currently limited by excessive noise in their constituent superconducting qubits. Determining the dominant sources of this excess noise will lead to a clearer understanding of how to mitigate it in future superconducting systems. Superconducting Nanowire Single-Photon Detectors (SNSPDs) are devices that do not appear to suffer from such effects and have extremely low dark-count backgrounds. We propose to use SNSPDs as low-background laboratories to study noise accumulation processes in superconducting sys…