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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Observation of dark pulses in 10 nm thick YBCO nanostrips presenting hysteretic current voltage characteristics
Mikkel Ejrnaes,Loredana Parlato,Riccardo Arpaia,Thilo Bauch,Floriana Lombardi,R. Cristiano,Francesco Tafuri,Giovanni Piero Pepe +7 more
TL;DR: In this article, the authors have fabricated several 10 nm thick and 65 nm wide YBa2Cu3O7-? (YBCO) nanostrips with hysteretic current voltage characteristics (IVCs) with a direct bistable switch from zerovoltage to the finite voltage state.
Journal ArticleDOI
A high-speed multi-protocol quantum key distribution transmitter based on a dual-drive modulator.
TL;DR: In this article, a dual-drive modulator that allows Alice to choose between various practical quantum key distribution (QKD) protocols depending on what receiver she is communicating with is proposed.
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Integration of colloidal PbS/CdS quantum dots with plasmonic antennas and superconducting detectors on a silicon nitride photonic platform
Lukas Elsinger,Ronan Gourgues,Iman Esmaeil Zadeh,Jorick Maes,Antonio Guardiani,Gabriele Bulgarini,Silvania F. Pereira,Sander N. Dorenbos,Val Zwiller,Zeger Hens,Dries Van Thourhout +10 more
TL;DR: The method developed in this paper is predicted to scale down to single QDs and newly developed emitters can be readily integrated on the chip-based platform.
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Thermal noise in mid-infrared broadband upconversion detectors
TL;DR: The optical power generated by frequency upconversion of the intrinsic black-body radiation in the nonlinear material itself due to the crystals residual emissivity is analyzed, i.e. absorption.
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Measurement-Device-Independent Quantum Key Distribution With Ensemble-Based Memories
TL;DR: In this article, it has been shown that the multiple-excitation effects in such memories can be so detrimental that they may wash away the scaling improvement offered by memory-equipped systems.
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.