English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

To analyze the switching dynamics and output performance of a superconductingnanowire single photon detector (SNSPD), the nanowire is usually modelled as aninductor in series with a time-varying resistor induced by absorption of aphoton. Our recent experimental results show that, due to the effect of kineticinductance, for a SNSPD made of a nanowire of sufficient length, its geometrylength can be comparable to or even longer than the effective wavelength offrequencies contained in the output pulse. In other words, a superconductingnanowire can behave as a distributed transmission line so that the readoutpulse depends on the photon detection location and the transmission lineproperties of the nanowire. Here, we develop a distributed model for asuperconducting nanowire and apply it to simulate the output performance of along nanowire designed into a coplanar waveguide. We compare this coplanarwaveguide geometry to a conventional meander nanowire geometry. The simulationresults agree well with our experimental observations. With this distributedmodel, we discussed the importance of microwave design of a nanowire and howimpedance matching can affect the output pulse shape. We also discuss how thedistributed model affects the growth and decay of the photon-triggeredresistive hotspot.

A distributed electrical model for superconducting nanowire single photon detectors