Middle-Infrared ultrafast superconducting single photon detector

被引：0

作者：

Gol'tsman, G. ^{[1
]}

Korneev, A. ^{[1
]}

Tarkhov, A. ^{[1
]}

Seleznev, V. ^{[1
]}

Divochiy, A. ^{[1
]}

Minaeva, O. ^{[1
]}

Kaurova, N. ^{[1
]}

Voronov, B. ^{[1
]}

Okunev, O. ^{[1
]}

Chulkova, G. ^{[1
]}

Milostnaya, I. ^{[1
]}

Smirnov, K. ^{[1
]}

机构：

[1] Moscow State Pedag Univ, Dept Phys, Moscow 119992, Russia

来源：

2007 JOINT 32ND INTERNATIONAL CONFERENCE ON INFRARED AND MILLIMETER WAVES AND 15TH INTERNATIONAL CONFERENCE ON TERAHERTZ ELECTRONICS, VOLS 1 AND 2 | 2007年

关键词：

SSPD; ultra-thin superconducting film; NbN; MoRe; quantum efficiency; NEP; nanostructure;

D O I：

暂无

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：

We present the results of the research on quantum efficiency of the ultrathin-film superconducting single-photon detectors (SSPD) in the wavelength rage from 1 mu m to 5.7 mu m . Reduction of operation temperature to 1.6 K allowed us to measure quantum efficiency of similar to 1% at 5.7 pro wavelength with the SSPD made from 4-nm-thick NbN film. In a pursuit of further performance improvement we endeavored SSI'D fabricating from 4-nm-thick MoRe film as an alternative material. The MoRe film exhibited transition temperature of 7.7K, critical current density at 4.2K temperature was 1.1X10(6) A/cm(2), and diffusivity 1.73 cm(2)/s. The single-photon response was observed with MoRe SSPD at 1.3 mu m wavelength with quantum efficiency estimated to be 0.04%.

引用

页码：113 / 114

页数：2

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