A superconducting nanowire single photon detector on lithium niobate

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 efficie...

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Veröffentlicht in:Nanotechnology 2012-12, Vol.23 (50), p.505201-1-6
Hauptverfasser: Tanner, M G, Alvarez, L San Emeterio, Jiang, W, Warburton, R J, Barber, Z H, Hadfield, R H
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Sprache:eng
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Zusammenfassung: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.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/23/50/505201