A distributed electrical model for superconducting nanowire single photon detectors
arXiv:1805.05601 · doi:10.1063/1.5040150
Abstract
To analyze the switching dynamics and output performance of a superconducting nanowire single photon detector (SNSPD), the nanowire is usually modelled as an inductor in series with a time-varying resistor induced by absorption of a photon. Our recent experimental results show that, due to the effect of kinetic inductance, for a SNSPD made of a nanowire of sufficient length, its geometry length can be comparable to or even longer than the effective wavelength of frequencies contained in the output pulse. In other words, a superconducting nanowire can behave as a distributed transmission line so that the readout pulse depends on the photon detection location and the transmission line properties of the nanowire. Here, we develop a distributed model for a superconducting nanowire and apply it to simulate the output performance of a long nanowire designed into a coplanar waveguide. We compare this coplanar waveguide geometry to a conventional meander nanowire geometry. The simulation results agree well with our experimental observations. With this distributed model, we discussed the importance of microwave design of a nanowire and how impedance matching can affect the output pulse shape. We also discuss how the distributed model affects the growth and decay of the photon-triggered resistive hotspot.
References in corpus (10)
- Single-photon detectors based on ultra-narrow superconducting nanowires
- A Single-Photon Imager Based on Microwave Plasmonic Superconducting Nanowire
- Electrothermal feedback in superconducting nanowire single-photon detectors
- Superconducting nanowire detector jitters limited by detector geometry
- Kinetic impedance and depairing in thin and narrow superconducting films
- Photon-number resolving detector based on a series array of superconducting nanowires
- A scalable multi-photon coincidence detector based on superconducting nanowires
- Frequency-Multiplexed bias and readout of a 16-pixel Superconducting Nanowire Single-Photon Detector Array
- Microwave dynamics of high aspect ratio superconducting nanowires studied using self-resonance
- Eight-fold signal amplification of a superconducting nanowire single-photon detector using a multiple-avalanche architecture
Cited by in corpus (7)
- Resolving photon numbers using a superconducting tapered nanowire detector
- Superconducting nanowire single-photon detector with integrated impedance-matching taper
- Photocounting statistics of superconducting nanowire single-photon detectors
- Jitter Characterization of a Dual-Readout SNSPD
- Position Sensitive Response of a Single-Pixel Large-Area SNSPD
- Geometrical jitter and bolometric regime in photon detection by straight superconducting nanowire
- Laser-Induced Relaxation Oscillations in Superconducting Nanobridge Single Photon Detectors