[19p-B303-1~18] 11.4 Analog applications and their related technologies

[19p-B303-3] Development and evaluation of small pixel Ir-TES

〇Yoshitaka Miura¹, Tomoya Irimatsugawa¹, Daiki Terauchi¹, Masashi Ohno¹, Hiroyuki Takahashi¹ (1.The Univ. of Tokyo)

Keywords:TES, small pixel, Iridium

We aim to realize a single-photon detector which greatly improves its sensitivity and response speed by minimizing of the thermometer volume using a single superconducting Ir thin film. Iridium has a sharp superconducting transition at 112 mK in bulk, therefore, even if it is used as a single superconducting thin film for the thermometer of TES, excellent energy resolution is expected.
Under this concept, we fabricated 5 to 25 μm size small pixel Ir-TES for single-photon detector. In this presentation, we will introduce the result in our first small pixel Ir-TES device (7 μm size, 20 nm thickness) and to perform the 1310 nm photon irradiation experiment using this small pixel Ir-TES.