[21a-W833-1~12] 11.4 Analog applications and their related technologies

[21a-W833-1] Fabrication of SSPD with ultimate low dark count rate

〇Hiroyuki Shibata¹, Kaoru Shimizu², Hiroki Takesue², Yasuhiro Tokura² (1.Kitami Inst. Tech., 2.NTT BRL.)

Keywords:superconductor,single photon detector

Dark count rate is the key parameter of single-photon detectors. By introducing a optical band-pass filter blocking down to 5 micron meter, we suppressed the dark count rate of SSPD by four orders of magnitude. The dark count rate is limited by the blackbody radiation through a signal passband of 20 nm bandwidth.