Detecting single infrared photons with 93% system efficiency
Francesco Marsili,Varun B. Verma,Jeffrey A. Stern,Sean D. Harrington,Adriana E. Lita,Thomas Gerrits,Igor Vayshenker,Burm Baek,M. D. Shaw,Richard P. Mirin,Sae Woo Nam +10 more
TLDR
In this article, a fiber-coupled single-photon detection system using amorphous tungsten silicide superconducting nanowire detectors was developed, and the system detection efficiency was higher than 90% in the wavelength range between 1520 nm and 1610 nm.Abstract:
Researchers develop a fiber-coupled single-photon-detection system using amorphous tungsten silicide superconducting nanowire single-photon detectors. The system detection efficiency is higher than 90% in the wavelength range between 1520 nm and 1610 nm. The device dark-count rate, timing jitter and reset time are 1 cps, 150 ps and 40 ns, respectively.read more
Citations
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Broadband Spectrometer with Single-Photon Sensitivity Exploiting Tailored Disorder.
Wladick Hartmann,Paris Varytis,Helge Gehring,Nicolai Walter,Fabian Beutel,Kurt Busch,Wolfram H. P. Pernice +6 more
TL;DR: An on-chip random spectrometer co-integrated with superconducting single-photon detectors suitable for photon-scarce environments is demonstrated and operation over a wide spectral range with sensitivity down to powers of 111.5 dBm in the telecom band.
Journal ArticleDOI
Violation of the Bell-Clauser-Horne-Shimony-Holt inequality using imperfect photodetectors with optical hybrid states
Hyuk-Joon Kwon,Hyunseok Jeong +1 more
TL;DR: In this article, the authors show that a Bell inequality test using an optical hybrid state between a polarized single photon and a coherent field can be highly robust against detection inefficiency, even when the detection efficiency degrades.
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Percolation-based architecture for cluster state creation using photon-mediated entanglement between atomic memories
TL;DR: In this article, percolation theory is used to accelerate the generation of arbitrarily large graph states by heralding the entanglement in a lattice of atomic memories with single-photon detection.
Journal ArticleDOI
Spiral superconducting nanowire single-photon detector with efficiency over 50% at 1550 nm wavelength
Jun Huang,Jun Huang,Wenbin Zhang,Wenbin Zhang,Lixing You,Lixing You,Xiao Liu,Xiao Liu,Qianjin Guo,Qianjin Guo,Yumei Wang,Yumei Wang,Luyuan Zhang,Luyuan Zhang,Yang Xibin,Yang Xibin,Huanrong Li,Huanrong Li,Z.G. Wang,Z.G. Wang,Xiao-Bao Xie,Xiao-Bao Xie +21 more
TL;DR: In order to obtain a polarization-insensitive single-photon detector with high detection efficiency, the authors in this paper fabricated a NbN SNSPD with spiral structure, which were embedded into an optical cavity.
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SNSPD With Ultimate Low System Dark Count Rate Using Various Cold Filters
TL;DR: In this paper, the effect of suppressing the dark count rate (DCR) using the various optical bandpass filters cooled at 3 K was investigated, and it was shown that the DCR can be strongly suppressed by introducing the cold filter.
References
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Quantum Computing
Thaddeus D. Ladd,Fedor Jelezko,Raymond Laflamme,Yasunobu Nakamura,Christopher Monroe,Jeremy L. O'Brien +5 more
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Gregory Goltsman,O. Okunev,G. M. Chulkova,A. Lipatov,A. D. Semenov,Konstantin Smirnov,B. M. Voronov,A. Dzardanov,C. Williams,Roman Sobolewski +9 more
TL;DR: In this article, a supercurrent-assisted hotspot-formation mechanism for ultrafast detection and counting of visible and infrared photons is presented, where a photon-induced hotspot leads to a temporary formation of a resistive barrier across the superconducting sensor strip and results in an easily measurable voltage pulse.
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Quantum Communication
Nicolas Gisin,Rob Thew +1 more
TL;DR: The current state of research and future directions in quantum key distribution and quantum networks are reviewed in this paper, with a special emphasis on quantum key distributions and quantum key sharing in quantum networks.
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Invited review article: Single-photon sources and detectors
TL;DR: The current status of single-photon-source and single-Photon-detector technologies operating at wavelengths from the ultraviolet to the infrared are reviewed and applications of these technologies to quantum communication are discussed.