sensitivity of superconducting single photon detector
G. M. Chulkova,
V. Semenov, A. A. Korneev, A. I. Kordakova, N. V. Averyev, P. P. An, A. Yu.
Kazakov, A. V. Trifonov
Moscow State Pedagogical University
Received October 31, 2011
Abstarct. We consider quantum
efficiency dependence on photons’ energy from hot spot model. Direction of
quasiparticles diffusion drive across superconductive film. The maximal quantum
efficiency is proportional to a probability of photon absorption. The spectral
sensitivity of superconductive single photon detector does not have clearly
expressed red limit. Changing regimes of work depends on a wavelength we can
get high values of quantum efficiency in visible and infrared range which
will be specified by the quality of fabrication of detectors and their
consistency with the radiation.
Key words: superconducting
single-photon detector, SSPD, quantum efficiency, spectral sensitivity.