[20p-A404-1~18] 3.9 Optical quantum physics and technologies (formerly 3.10)

△ [20p-A404-16] Evaluation of superconducting nanostrip photon-number-resolving detectors
with additional choke coil

〇Kazuma Takahashi¹, Mamoru Endo^1,4, Tatsuki Tatsuki¹, Shigeto Miki^2,3, Masahiro Yabuno², Humihiro China², Hirotaka Terai², Kan Takase^1,4, Warit Asavanant^1,4, Akira Furusawa^1,4 (1.Univ. of Tokyo, 2.NICT, 3.Kobe Univ., 4.RIKEN)

Keywords:quantum photonics, SSPD, SNSPD

Superconducting nano-strip photon number resolving detectors (SNSPD) are widely used as fast single-photon detectors, but their photon number resolving ability is low. In this study, we considered that the photon number resolving ability of SNSPD is limited by the bandwidth of a detector and attempted to increase the photon number resolving ability by adding a choke coil to slow down the detector. In this presentation, we report the results of evaluating the photon number resolving ability of three SNSPDs with different choke coil inductances.