Spatially dependent sensitivity of superconducting meanders as single-photon detectors

Golibjon Berdiyorov, M. V. Milošević, F. M. Peeters

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The photo-response of a thin current-carrying superconducting stripe with a 90° turn is studied within the time-dependent Ginzburg-Landau theory. We show that the photon acting near the inner corner (where the current density is maximal due to the current crowding [J. R. Clem and K. K. Berggren, Phys. Rev. B 84, 174510 (2011)]) triggers the nucleation of superconducting vortices at currents much smaller than the expected critical one, but does not bring the system to a higher resistive state and thus remains undetected. The transition to the resistive state occurs only when the photon hits the stripe away from the corner due to there uniform current distribution across the sample, and dissipation is due to the nucleation of a kinematic vortex-antivortex pair near the photon incidence. We propose strategies to account for this problem in the measurements.

Original languageEnglish
Article number262603
JournalApplied Physics Letters
Volume100
Issue number26
DOIs
Publication statusPublished - 25 Jun 2012
Externally publishedYes

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meanders
sensitivity
detectors
photons
nucleation
vortices
crowding
current distribution
kinematics
dissipation
incidence
actuators
current density

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Spatially dependent sensitivity of superconducting meanders as single-photon detectors. / Berdiyorov, Golibjon; Milošević, M. V.; Peeters, F. M.

In: Applied Physics Letters, Vol. 100, No. 26, 262603, 25.06.2012.

Research output: Contribution to journalArticle

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