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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Demonstration of a Thermally Coupled Row-Column SNSPD Imaging Array.
Jason P. Allmaras,Emma E. Wollman,Andrew D. Beyer,Ryan M. Briggs,Boris Korzh,B. Bumble,Matthew D. Shaw +6 more
TL;DR: This work proposes a new SNSPD multiplexing system using thermal coupling and detection correlations between two photosensitive layers of an array using a thermally coupled row-column scheme and demonstrates imaging capability in 16-pixel arrays with accurate spot tracking at the few-photon level.
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Unconventional Applications of Superconducting Nanowire Single Photon Detectors.
Tomas Polakovic,Tomas Polakovic,Whitney Armstrong,Goran Karapetrov,Zein-Eddine Meziani,Valentine Novosad +5 more
TL;DR: The progress in use of superconducting nanowire technology in photon and particle detection outside of the usual areas of physics is reviewed, with emphasis on the potential use in ongoing and future experiments in nuclear and high energy physics.
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Afterpulsing studies of low-noise InGaAs/InP single-photon negative-feedback avalanche diodes
TL;DR: In this paper, the temporal evolution of the afterpulse probability in a free-running negative-feedback avalanche diode (NFAD) over an extended range, from ∼300 ns to ∼1 ms, was investigated.
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Experimental few-copy multi-particle entanglement detection
TL;DR: A general scheme for a resource-efficient probabilistic detection of multipartite entanglement is demonstrated on six-partite cluster states and can be carried out with a remarkably low number of copies and in the presence of experimental imperfections, making it a practical and applicable method to verify large-scale quantum devices.
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A cost-effective measurement-device-independent quantum key distribution system for quantum networks
Raju Valivarthi,Qiang Zhou,Caleb John,Francesco Marsili,Varun B. Verma,Matthew D. Shaw,Sae Woo Nam,Daniel Oblak,Wolfgang Tittel +8 more
TL;DR: In this paper, a measurement-device-independent quantum key distribution (MDI-QKD) system is presented, which is based on cost-effective and commercially available hardware such as distributed feedback lasers and field-programmable gate arrays that enable timebin qubit preparation and time-tagging, and active feedback systems that allow for compensation of time-varying properties of photons after transmission through deployed fiber.
References
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Quantum Computing
Thaddeus D. Ladd,Fedor Jelezko,Raymond Laflamme,Yasunobu Nakamura,Christopher Monroe,Jeremy L. O'Brien +5 more
TL;DR: A number of physical systems, spanning much of modern physics, are being developed for this task, ranging from single particles of light to superconducting circuits, and it is not yet clear which, if any, will ultimately prove successful as discussed by the authors.
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Picosecond superconducting single-photon optical detector
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.