PT Journal
AU Korneeva, Y
   Florya, I
   Vdovichev, S
   Moshkova, M
   Simonov, N
   Kaurova, N
   Korneev, A
   Goltsman, G
TI Comparison of hot spot formation in nbn and mon thin superconducting films after photon absorption
SO IEEE Trans. Appl. Supercond.
JI IEEE Trans. Appl. Supercond.
PY 2017
BP 1
EP 4
VL 27
IS 4
DI 10.1109/TASC.2017.2659661
DE MoNx SSPD
AB In superconducting single-photon detectors (SSPD), the efficiency of local suppression of superconductivity and hotspot formation is controlled by diffusivity and electron-phonon interaction time. Here, we selected a material, 3.6-nm-thick MoNx film, which features diffusivity close to those of NbN traditionally used for SSPD fabrication, but with electron-phonon interaction time an order of magnitude larger. In MoN ∞ detectors, we study the dependence of detection efficiency on bias current, photon energy, and strip width, and compare it with NbN SSPD. We observe nonlinear current-energy dependence in MoNx SSPD and more pronounced plateaus in dependences of detection efficiency on bias current, which we attribute to longer electron-phonon interaction time.
ER