PT Unknown AU Slysz, W Wegrzecki, M Papis, E Gol'tsman, GN Verevkin, A Sobolewski, R AU 5-th International Symposium Ion Implantation and Other Applications of Ions and Electrons, ION TI A method of optimization of the NbN superconducting single-photon detector PY 2004 DE NbN SSPD; SNSPD ER