Title :
Characterization of MoSi Superconducting Single-Photon Detectors in the Magnetic Field
Author :
Korneev, Alexander A. ; Korneeva, Yuliya P. ; Mikhailov, Mikhail Yu ; Pershin, Yuri P. ; Semenov, Alexander V. ; Vodolazov, D.Yu. ; Divochiy, Alexander V. ; Vakhtomin, Yuri B. ; Smirnov, Konstantin V. ; Sivakov, Alexander G. ; Devizenko, Alexander Yu ; Go
Author_Institution :
Moscow State Pedagogical Univ., Moscow, Russia
Abstract :
We investigate the response mechanism of nanowire superconducting single-photon detectors (SSPDs) made of amorphous MoxSi1-x. We study the dependence of photon count and dark count rates on bias current in magnetic fields up to 113 mT at 1.7 K temperature. The observed behavior of photon counts is similar to the one recently observed in NbN SSPDs. Our results show that the detecting mechanism of relatively high-energy photons does not involve the vortex penetration from the edges of the film, and on the contrary, the detecting mechanism of low-energy photons probably involves the vortex penetration from the film edges.
Keywords :
molybdenum compounds; nanosensors; nanowires; photon counting; superconducting photodetectors; superconducting thin films; MoxSi1-x; amorphous film; bias current; dark count rates; high-energy photon; low-energy photons; magnetic fields; nanowire superconducting single-photon detectors; photon count rates; temperature 1.7 K; vortex penetration; Current measurement; Detectors; Films; Magnetic field measurement; Magnetic fields; Photonics; Temperature measurement; Infrared single-photon detectors; superconducting MoSi films; vortices in superconducting thin films;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2014.2376892
