PT Unknown AU Marsili, F Bitauld, D Fiore, A Gaggero, A Mattioli, F Leoni, R Divochiy, A Gol'tsman, G TI Photon-number-resolution at telecom wavelength with superconducting nanowires PY 2010 DI 10.5772/6920 DE SSPD; SNSPD ER