M Ejrnaes et al 2009 Supercond. Sci. Technol. 22 055006 doi:10.1088/0953-2048/22/5/055006
M Ejrnaes1, A Casaburi1,2, O Quaranta2, S Marchetti2, A Gaggero3, F Mattioli3, R Leoni3, S Pagano1,2 and R Cristiano1
Show affiliationsSuperconducting nanowire single photon detectors (SNSPDs) have been realized using an innovative parallel wire configuration. This configuration allows, at the same time, a large detection area and a fast response, with the additional advantage of large signal amplitudes. The detectors have been thoroughly characterized in terms of signal properties (amplitude, risetime and falltime), detector operation (latching and not latching) and quantum efficiency (at 850 nm). It has been shown that the parallel SNSPD is able to provide significantly higher maximum count rates for large area SNSPDs than meandered SNSPDs. Through a proper parallel wire configuration the increase in maximum count rate can be obtained without latching problems.
74.78.Na Mesoscopic and nanoscale systems
85.25.Oj Superconducting optical, x-ray, and gamma-ray detectors (SIS, NIS, transition edge)
85.25.Pb Superconducting infrared, submillimeter and millimeter wave detectors
85.25.Am Superconducting device characterization, design, and modeling
Issue 5 (May 2009)
Received 18 November 2008, in final form 6 February 2009
Published 30 March 2009
M Ejrnaes et al 2009 Supercond. Sci. Technol. 22 055006
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