[20p-E205-1~12] 3.8 Optical measurement, instrumentation, and sensor

[20p-E205-5] High quantum efficiency, Ir-transition edge sensor

〇(M1)Mikihisa Matsuyama¹, Mamoru Endo¹, Casper Breum², Yuki Mitsuya¹, Yoshitaka Miura¹, Masashi Ohno¹, Hiroyuki Takahashi¹, Akira Furusawa¹ (1.Univ. of Tokyo, 2.Tech. Univ. of Denmark)

Keywords:superconducting transition edge sensor, photon number resolving detector, quantum information

For optical quantum information processing, the superconducting transition sensor (TES) has attracted attention as a photon-number-resolving detector because it has low dark count rate and high energy resolution. We focus on iridium TES, which has a lower operating temperature than previously developed, and less thermal noise. In this talk, we introduce quantum efficiency improvement by using a perpendicular lensed fiber and an infrared microscope.