A superconducting nanowire single photon detector on lithium niobate

Tanner, M.G., Alvarez, L.S.E., Jiang, W., Warburton, R.J., Barber, Z.H. and Hadfield, R.H. (2012) A superconducting nanowire single photon detector on lithium niobate. Nanotechnology, 23(50), p. 505201. (doi:10.1088/0957-4484/23/50/505201)

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Abstract

Superconducting nanowire single photon detectors (SNSPDs) are a key enabling technology for optical quantum information science. In this paper we demonstrate a SNSPD fabricated on lithium niobate, an important material for high speed integrated photonic circuits. We report a system detection efficiency of 0.15% at a 1 kHz dark count rate with a maximum of ~1% close to the critical current at 1550 nm wavelength for a parallel wire SNSPD with front side illumination. There is clear scope for improving on this performance with further materials optimization. Detector integration with a lithium niobate optical waveguide is simulated, demonstrating the potential for high single photon detection efficiency in an integrated quantum optic circuit.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Tanner, Dr Michael and Hadfield, Professor Robert
Authors: Tanner, M.G., Alvarez, L.S.E., Jiang, W., Warburton, R.J., Barber, Z.H., and Hadfield, R.H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Nanotechnology
ISSN:0957-4484
Published Online:26 November 2012

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