Title :
Semiempirical Modeling of Dark Count Rate and Quantum Efficiency of Superconducting Nanowire Single-Photon Detectors
Author :
Akhlaghi, Mohsen Keshavarz ; Majedi, Amir Hamed
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON, Canada
fDate :
6/1/2009 12:00:00 AM
Abstract :
We present our semiempirical approach for modeling dark count rate (DCR) and quantum efficiency (QE) of current biased superconducting nanowire single photon detectors (SNSPDs). Using the qualitative outcomes of the present SNSPD models, we define new quantitative parameters including hotspot lifetime, resistive barrier generation rates and detector dead time to mathematically integrate different physical phenomena of the device into a unified model. The capability of the model to predict the outcomes of the measurements is demonstrated by reporting the details of the supporting experiments and showing a good agreement between simulation and experimental results.
Keywords :
nanowires; photon counting; superconducting photodetectors; dark count rate; detector dead time; hotspot lifetime; quantitative parameters; quantum efficiency; resistive barrier generation rates; semiempirical modeling; superconducting nanowire single-photon detectors; Applied superconductivity; NbN superconducting films; quantum detection; single photon detector; superconducting nanowire single photon detectors (SNSPD); superconducting optoelectronics;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2009.2018846