Effective suppression of dark counts in superconducting microstructures with grid of pinholes in a magnetic field
Dong Zhu,
Ilya Charaev,
Andreas Schilling
Abstract:In a magnetic field, vortices significantly contribute to the dark counts of single-photon detectors made of superconducting wires, and they are also limiting the critical current of such devices. To address this issue, we prepared superconducting microwires with a pinhole grid from WSi thin films and report on corresponding critical-current and count-rate measurements in an external magnetic field B. When compared to corresponding devices without pinholes, the critical current only weakly depends on the magne… Show more
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