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 |
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Format: | Artikel |
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. |
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ISSN: | 0957-4484 1361-6528 |
DOI: | 10.1088/0957-4484/23/50/505201 |