Electrothermal feedback in superconducting nanowire single-photon detectors

被引：150

作者：

Kerman, Andrew J. ^{[1
]}

Yang, Joel K. W. ^{[2
]}

Molnar, Richard J. ^{[1
]}

Dauler, Eric A. ^{[1
,2
]}

Berggren, Karl K. ^{[2
]}

机构：

[1] MIT, Lincoln Lab, Lexington, MA 02420 USA

[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 10期

关键词：

feedback; inductance; nanotechnology; nanowires; superconducting photodetectors; THERMAL-RESPONSE;

D O I：

10.1103/PhysRevB.79.100509

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the role of electrothermal feedback in the operation of superconducting nanowire single-photon detectors (SNSPDs). It is found that the desired mode of operation for SNSPDs is only achieved if this feedback is unstable, which happens naturally through the slow electrical response associated with their relatively large kinetic inductance. If this response is sped up in an effort to increase the device count rate, the electrothermal feedback becomes stable and results in an effect known as latching, where the device is locked in a resistive state and can no longer detect photons. We present a set of experiments which elucidate this effect and a simple model which quantitatively explains the results.

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页数：4

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