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Enhanced telecom wavelength single-photon detection with NbTiN superconducting nanowires on oxidized silicon

Tanner, M. G. and Natarajan, C. M. and Pottapenjara, V. K. and O’Connor, J. A. and Warburton, R. J. and Hadfield, R. H. and Baek, B. and Nam, S. and Dorenbos, S. N. and Bermúdez Ureña, E. and Zijlstra, T. and Klapwijk, T. M. and Zwiller, V. (2010) Enhanced telecom wavelength single-photon detection with NbTiN superconducting nanowires on oxidized silicon. Applied Physics Letters, 96 (22). Art. No. 221109. ISSN 0003-6951. doi:10.1063/1.3428960.

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Superconducting nanowire single-photon detectors (SNSPDs) have emerged as a highly promising infrared single-photon detector technology. Next-generation devices are being developed with enhanced detection efficiency (DE) at key technological wavelengths via the use of optical cavities. Furthermore, new materials and substrates are being explored for improved fabrication versatility, higher DE, and lower dark counts. We report on the practical performance of packaged NbTiN SNSPDs fabricated on oxidized silicon substrates in the wavelength range from 830 to 1700 nm. We exploit constructive interference from the SiO_2/Si interface in order to achieve enhanced front-side fiber-coupled DE of 23.2 % at 1310 nm, at 1 kHz dark count rate, with 60 ps full width half maximum timing jitter.

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Additional Information:© 2010 American Institute of Physics. Received 10 February 2010; accepted 21 April 2010; published online 3 June 2010. This work is supported by the UK Engineering and Physical Science Research Council. R.H.H. is supported by the Royal Society of London (UK) via a University Research Fellowship. We thank Ryan Warburton and Gerald Buller for assistance with the timing jitter measurements.
Group:Keck Institute for Space Studies
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Engineering and Physical Sciences Research Council (EPSRC)UNSPECIFIED
Issue or Number:22
Record Number:CaltechAUTHORS:20160311-145652163
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65316
Deposited By: Colette Connor
Deposited On:11 Mar 2016 23:12
Last Modified:10 Nov 2021 23:44

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