Large Signal Amplitude and Bias Range of Cascade Switch Superconducting Nanowire Single Photon Detectors

被引：8

作者：

Ejrnaes, Mikkel ^{[1
]}

Casaburi, Alessandro ^{[1
,2
]}

Quaranta, Orlando ^{[2
]}

Marchetti, Stefania ^{[2
]}

Gaggero, Alessandro ^{[3
]}

Mattioli, Francesco ^{[3
]}

Leoni, Roberto ^{[3
]}

Pagano, Sergio ^{[1
,2
]}

Cristiano, Roberto ^{[1
]}

机构：

[1] Inst Cybernet, CNR, I-80078 Pozzuoli, NA, Italy

[2] Univ Salerno, Dept Phys ER Caianiello, I-84081 Baronissi, Italy

[3] CNR, Inst Photon & Nanotechnol, I-00156 Rome, Italy

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2009年 / 19卷 / 03期

关键词：

Infrared detectors; nanotechnology; superconducting radiation detectors; thin films;

D O I：

10.1109/TASC.2009.2019034

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：

Cascade switch superconducting nanowire single photon detectors has been fabricated of ultrathin NbN films deposited by DC-magnetron sputtering at room temperature on MgO substrates. Detectors using 4 to 24 nanowires in parallel, having an area coverage of 5 x 6 mu m(2) and a filling factor of 40%, have been investigated. Signal amplitudes increase with the number of parallel nanowires and reaches 12.3 mV with a signal noise of 20 mu V. The range of bias currents where the detectors emit signal pulses also increase with the number of parallel nanowires and exceeds the nanowire critical current.

引用

页码：323 / 326

页数：4

共 15 条

[11] Large sensitive-area NbN nanowire superconducting single-photon detectors fabricated on single-crystal MgO substrates [J].