Noise of a superconducting photon detector

Author

Semenov, Alexei ; Engel, Andreas ; Il´in, Konstantin ; Siegel, Michael ; Hübers, Heinz-Wilhelm

Author_Institution

Inst. of Planetary Res. of the German Aerosp. Center, Berlin, Germany

Volume

15

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

518

Lastpage

521

Abstract

We have studied electrical noise of photon detectors representing long and narrow superconducting strips. For large bias currents close to the critical current fluctuations lead to localized, temporary transitions into the normal conducting state, which can be detected as voltage transients developing between the strip ends. We present models based on fluctuations of the chemical potential and current-assisted thermal-unbinding of vortex-antivortex pairs, which explain the current and temperature-dependence of the detector noise.

Keywords

superconducting device noise; superconducting particle detectors; chemical potential; critical current fluctuations; current-assisted thermal-unbinding; detector noise; electrical noise; superconducting photon detector; vortex-antivortex pairs; Chemicals; Detectors; Electrons; Fluctuations; Noise level; Semiconductor device noise; Strips; Superconducting device noise; Superconducting films; Superconducting transition temperature; Electric noise; fluctuations; photon detection; superconducting nanostructures;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.849893

Filename

1439688