Large signal amplitude and bias range of cascade switch superconducting nanowire single photon detectors

Ejrnaes, M., Casaburi, A. , Quaranta, O., Marchetti, S., Gaggero, A., Mattioli, F., Leoni, R., Pagano, S. and Cristiano, R. (2009) Large signal amplitude and bias range of cascade switch superconducting nanowire single photon detectors. IEEE Transactions on Applied Superconductivity, 19(3), pp. 323-326. (doi:10.1109/TASC.2009.2019034)

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Abstract

Cascade switch superconducting nanowire single photon detectors has been fabricated of ultrathin NbN films deposited by DC-magnetron sputtering at room temperature on MgO substrates. Detectors using 4 to 24 nanowires in parallel, having an area coverage of 5times mum2 and a filling factor of 40%, have been investigated. Signal amplitudes increase with the number of parallel nanowires and reaches 12.3 mV with a signal noise of 20 muV. The range of bias currents where the detectors emit signal pulses also increase with the number of parallel nanowires and exceeds the nanowire critical current.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Casaburi, Dr Alessandro
Authors: Ejrnaes, M., Casaburi, A., Quaranta, O., Marchetti, S., Gaggero, A., Mattioli, F., Leoni, R., Pagano, S., and Cristiano, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Transactions on Applied Superconductivity
ISSN:1051-8223

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