Characterization of a Superconducting Microstrip Single-Photon Detector Shunted with an External Resistor
arXiv:2304.08762 · doi:10.1088/1361-6668/acce74
Abstract
A superconducting microstrip single-photon detector (SMSPD) generally requires a shunt resistor to avoid latching, caused by its high current-carrying capacity and low kinetic inductance. Here, the effect of the shunt resistor on the behaviors of microbridge SMSPDs was investigated. We analyzed the change in equivalent switching current at different shunt resistances in two ways and determined the operating current range using intrinsic dark count rate (iDCR) curves. We observed that the reduction in shunt resistance can increase the operating current range, which helps to improve the internal detection efficiency (IDE) and reduce the iDCR. However, the reduction in the shunt resistance can reduce the pulse amplitude and increase the pulse decay time, which can degrade the timing jitter and count rate performance of the SMSPD. The trends of the experimental results can be qualitatively reproduced using a circuit model for an SMSPD with a shunt resistor, which provides useful information for the selection of shunt resistors. Furthermore, we report the improved detection performance of a helium-ion-irradiated SMSPD shunted with a small resistance of 5.2 Ω. We observed a weak IDE saturation with a bias current at a wavelength up to 2000 nm and a nonlinear relation between detection current and photon energy.
arXiv comment13 pages, 8 figures, 1 table
References in corpus (18)
- Detecting Single Infrared Photons with 93% System Efficiency
- Demonstrating sub-3 ps temporal resolution in a superconducting nanowire single-photon detector
- NbN superconducting nanowire single photon detector with efficiency over 90% at 1550 nm wavelength operational at compact cryocooler temperature
- Electrothermal feedback in superconducting nanowire single-photon detectors
- Theory of single photon detection by 'dirty' current-carrying superconducting strip based on the kinetic equation approach
- Photon detection by current-carrying superconducting film: A time-dependent Ginzburg-Landau approach
- Reset dynamics and latching in niobium superconducting nanowire single-photon detectors
- Optical single photon detection in micron-scaled NbN bridges
- Determining Dark Matter-Electron Scattering Rates from the Dielectric Function
- Large-area microwire MoSi single-photon detectors at 1550 nm wavelength
- Origin of intrinsic dark count in superconducting nanowire single-photon detectors
- Superconducting microwire detectors with single-photon sensitivity in the near-infrared
- Enhancing intrinsic detection efficiency of superconducting nanowire single-photon detectors via helium ion irradiation
- Superconducting microstrip single-photon detector with system detection efficiency over 90% at 1550 nm
- Dynamics of superconducting nanowires shunted with an external resistor
- Nonlatching Superconducting Nanowire Single-Photon Detection with Quasi-Constant-Voltage Bias
- Broadband polarization insensitivity and high detection efficiency in high-fill-factor superconducting microwire single-photon detectors
- Laser-lithographically written micron-wide superconducting nanowire single-photon detectors