Dynamics of hotspot formation in nanostructured superconducting stripes excited with single photons

Dynamics of a resistive hotspot formation by near-infrared-wavelengthsingle photons in nanowire-type superconducting NbN stripes was investi-gated. Numerical simulations of ultrafast thermalization of photon-excitednonequilibrium quasiparticles, their multiplication and out-difiusion from asite of the photon absorption demonstrate that 1.55