Superconducting single photon detectors integrated with single flux quantum readout circuits in a cryocooler

被引：52
|
作者：
Miki, Shigehito [1 ]
Terai, Hirotaka [1 ]
Yamashita, Taro [1 ]
Makise, Kazumasa [1 ]
Fujiwara, Mikio [1 ]
Sasaki, Masahide [1 ]
Wang, Zhen [1 ]
机构：
[1] Natl Inst Informat & Commun Technol, Nishi Ku, Kobe, Hyogo 6512492, Japan
来源：
APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 11期
关键词：
DETECTION EFFICIENCY; KEY DISTRIBUTION; SYSTEM;
D O I：
10.1063/1.3640503
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report the operation of superconducting single photon detectors (SSPDs) with integrated readout electronics based on a single-flux-quantum (SFQ) circuit. The SSPDs were connected to a SFQ readout circuit without bias tee in a cryocooler system, and detection efficiencies (DEs) were measured to verify their correct operation. The DE curves matched well with those measured by conventional readout electronics, and the maximum bias current for normal operation was increased. In addition, we confirmed that the SFQ circuit correctly merged the input signals from two SSPDs. SSPDs with a SFQ readout circuit demonstrated a favorable timing jitter of 50 ps. (C) 2011 American Institute of Physics. [doi:10.1063/1.3640503]
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页数：3
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