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arXiv · 1607.07459

High-efficiency WSi superconducting nanowire single-photon detectors for quantum state engineering in the near infrared

H. Le Jeannic·V. B. Verma·A. Cavaillès·F. Marsili·M. D. Shaw·K. Huang·O. Morin·S. W. Nam·J. Laurat
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Abstract

We report on high-efficiency superconducting nanowire single-photon detectors based on amorphous WSi and optimized at 1064 nm. At an operating temperature of 1.8 K, we demonstrated a 93% system detection efficiency at this wavelength with a dark noise of a few counts per second. Combined with cavity-enhanced spontaneous parametric down-conversion, this fiber-coupled detector enabled us to generate narrowband single photons with a heralding efficiency greater than 90% and a high spectral brightness of $0.6\times10^4$ photons/(s$\cdot$mW$\cdot$MHz). Beyond single-photon generation at large rate, such high-efficiency detectors open the path to efficient multiple-photon heralding and complex quantum state engineering.

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BibTeXRIS

H. Le Jeannic, V. B. Verma, A. Cavaillès, F. Marsili, M. D. Shaw, K. Huang, O. Morin, S. W. Nam, J. Laurat. 2016-11-14. High-efficiency WSi superconducting nanowire single-photon detectors for quantum state engineering in the near infrared. https://doi.org/10.1364/ol.41.005341

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