SNSPD With Ultimate Low System Dark Count Rate Using Various Cold Filters Shibata, Hiroyuki ; Fukao, Kentaro ; Kirigane, Naoto ; Karimoto, Shinichi ; Yamamoto, Hideki Abstract Publication: IEEE Transactions on Applied Superconductivity Pub Date: June 2017 DOI: 10.1109/TASC.2016.2631947 Bibcode: 2017ITAS...2731947S