Enhanced telecom wavelength single-photon detection with NbTiN superconducting nanowires on oxidized silicon
Abstract
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.
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.Attached Files
Published - Enhanced_telecome.pdf
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Additional details
- Eprint ID
- 65316
- Resolver ID
- CaltechAUTHORS:20160311-145652163
- Engineering and Physical Sciences Research Council (EPSRC)
- Royal Society
- Created
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2016-03-11Created from EPrint's datestamp field
- Updated
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2023-03-16Created from EPrint's last_modified field
- Caltech groups
- Keck Institute for Space Studies