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Spatial dependence of output pulse delay in a niobium nitride nanowire superconducting single-photon detector

O`Connor, J. A. and Tanner, M. G. and Natarajan, C. M. and Buller, G. S. and Warburton, R. J. and Miki, S. and Wang, Z. and Nam, S. W. and Hadfield, R. H.. (2011) Spatial dependence of output pulse delay in a niobium nitride nanowire superconducting single-photon detector. Applied physics letters, Vol. 98, H. 20 , 201116.

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Official URL: http://edoc.unibas.ch/dok/A6002518

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Abstract

We report on the position-dependent variation in output pulse timing across a superconducting single-photon detector. Our device consists of a single niobium nitride nanowire meander (100 nm width, 4 nm film thickness, 2 mm length). We use a confocal microscope configuration (full width at half maximum-spot size 1.3 mu m at 1550 nm wavelength) and a femtosecond laser to study local variations in detection efficiency and output pulse timing. Pulse delays of up to 50 ps across the device correlate to local detection efficiency and resistance variations. This study indicates an underlying mechanism for timing jitter in superconducting nanowire devices. (C) 2011 American Institute of Physics. [doi:10.1063/1.3581054]
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimental Physics (Warburton)
UniBasel Contributors:Warburton, Richard J
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Institute of Physics
ISSN:0003-6951
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:11 Oct 2012 15:31
Deposited On:11 Oct 2012 15:25

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