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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Superconducting nanowire single-photon detectors fabricated from atomic-layer-deposited NbN
TL;DR: The ALD-NbN material represents an ideal superconducting material for fabricating large single-photon detector arrays combining high efficiency, low jitter, and low dark counts as discussed by the authors.
Journal ArticleDOI
NbN superconducting nanowire single-photon detector with an active area of 300 μm-in-diameter
Chengjun Zhang,Chengjun Zhang,Weijun Zhang,Weijun Zhang,Jia Huang,Jia Huang,Lixing You,Lixing You,Hao Li,Hao Li,Chaolin Lv,Chaolin Lv,Tatsuki Sugihara,Masahiko Watanabe,Hui Zhou,Hui Zhou,Zhen Wang,Zhen Wang,Xiaoming Xie,Xiaoming Xie +19 more
TL;DR: In this article, a superconducting nanowire single-photon detectors (SNSPD) with a circular active area of 300 μm-in-diameter and multiple approaches to boost the maximal count rate (MCR) are presented.
Journal ArticleDOI
A high-speed multi-protocol quantum key distribution transmitter based on a dual-drive modulator
TL;DR: Experimental results show that the proposed transmitter is suitable for implementation of the Bennett and Brassard 1984 (BB84), coherent one-way (COW) and differential phase shift (DPS) protocols with stable and low quantum bit error rate.
Journal ArticleDOI
Storage and Reemission of Heralded Telecommunication-Wavelength Photons Using a Crystal Waveguide
Mohsen Falamarzi Askarani,Mohsen Falamarzi Askarani,Marcel.li Grimau Puigibert,Marcel.li Grimau Puigibert,Thomas Lutz,Thomas Lutz,Varun B. Verma,Matthew D. Shaw,Sae Woo Nam,Neil Sinclair,Neil Sinclair,Daniel Oblak,Wolfgang Tittel,Wolfgang Tittel +13 more
TL;DR: In this paper, the authors demonstrate the storage and reemission of single heralded 1532-nm-wavelength photons using a crystal waveguide, and the photons are emitted from a photon-pair source based on spontaneous parametric down-conversion and the memory is based on an atomic frequency comb.
Journal ArticleDOI
Efficient detection of an ultra-bright single-photon source using superconducting nanowire single-photon detectors
Rui-Bo Jin,Mikio Fujiwara,Taro Yamashita,Shigehito Miki,Hirotaka Terai,Zhen Wang,Zhen Wang,Kentaro Wakui,Ryosuke Shimizu,Masahide Sasaki +9 more
TL;DR: In this paper, the authors investigated the detection of a single-photon source using highly efficient superconducting nanowire singlephoton detectors (SNSPDs) at telecom wavelengths.
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.