High Performance Superconducting Nanowire Single Photon Detectors for QKD Applications

被引：1

作者：

Bruscino, C. ^{[1
]}

Ercolano, P. ^{[1
]}

Salvoni, D. ^{[2
]}

Di Giancamillo, M. ^{[3
]}

Zhang, C. ^{[2
]}

Ejrnaes, M. ^{[4
]}

Li, H. ^{[5
]}

You, L. ^{[5
]}

Parlato, L. ^{[1
,4
]}

Martinelli, M. ^{[3
]}

Pepe, G. P. ^{[1
,4
]}

机构：

[1] Univ Napoli Federico II, Dip Fis E Pancini, I-80125 Naples, Italy

[2] Photon Technol Zhejiang Co Ltd, Jiashan 314100, Peoples R China

[3] Politecn Milan, Dept Elect & Informat, I-20133 Milan, Italy

[4] CNR SPIN Inst Supercond Innovat Mat & Devices, I-80078 Pozzuoli, Italy

[5] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Shanghai Key Lab Supercoductor Integrated Circuit, Shanghai 200050, Peoples R China

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2024年 / 34卷 / 03期

关键词：

BB84; protocol; decoy state method; quantum key distribution; superconducting photodetectors; superconducting nanowire single photon detectors;

D O I：

10.1109/TASC.2024.3355878

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The forthcoming era of quantum computers can be a threat to the conventional cryptography and data security. Quantum Key Distribution (QKD) provides unconditional security under real-life conditions with several protocols over long distances in fibre and free space communication. Superconducting Nanowire Single Photon Detectors (SNSPDs) are becoming a dominant technology for QKD thanks to their unique characteristics, such as a near-unity efficiency in the infrared, low dark counts and picoseconds time resolution. Where the detector is typically a weakness of QKD, these SNSPDs characteristics make exploitation difficult. In this work, we characterized NbN SNSPDs at 2.2 K, using a CW laser source at 1550 nm, varying both bias currents and input photon rates to prove their high efficiency at low dark counts with a high counting rate, consistent with the requirements for QKD over long distances or with a high secure key rate.

引用

页码：1 / 5

页数：5

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