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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Journal ArticleDOI
Superconducting nanowire single-photon detectors at a wavelength of 940 nm
Weijun Zhang,Hao Li,Lixing You,Yuhao He,Lei Zhang,Xiao-Yu Liu,Yang Xibin,JunJie Wu,Qianjin Guo,Sijing Chen,Zhen Wang,Xiaoming Xie +11 more
TL;DR: In this article, a single-photon detector comprising singlemode fiber-coupled superconducting nanowires, with high system detection efficiencies at a wavelength of 940 nm, is presented.
Journal ArticleDOI
Superconducting detector of IR single-photons based on thin WSi films
Vitaliy Seleznev,Alexander Divochiy,Yu. B. Vakhtomin,P. V. Morozov,P I Zolotov,D. D. Vasilev,K M Moiseev,E I Malevannaya,Konstantin Smirnov,Konstantin Smirnov +9 more
TL;DR: In this paper, the authors developed the deposition technology of WSi thin films 4 to 9 nm thick with high temperature values of superconducting transition (Tc~4 K) which certifies high quality and homogeneity of the films created.
Dissertation
Superconducting Nanostructures for Quantum Detection of Electromagnetic Radiation
TL;DR: In this article, the effect of high-frequency field on 1D superconducting nanowires and derive the complex conductivity was investigated and it was shown that in a multi-layer structure, the potential barrier for vortices to penetrate inside the structure is elevated.
Journal ArticleDOI
Improving detection efficiency of superconducting nanowire single-photon detector using multilayer antireflection coating
Hao Li,Hao Li,Xiaoyan Yang,Xiaoyan Yang,Lixing You,Lixing You,Heqing Wang,Heqing Wang,Peng Hu,Peng Hu,Weijun Zhang,Weijun Zhang,Zhen Wang,Zhen Wang,Xiaoming Xie,Xiaoming Xie +15 more
TL;DR: In this paper, a multilayer anti-reflection coating (ARC) was applied on the backside of the substrate to further increase the transmittance from 94.5% to 99.5%.
References
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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
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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.