Development of a Small-Pixel Ir-TES for Optical Applications
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We designed and fabricated a photon-number-resolving detector based on an iridium (Ir) transition-edge sensors (TES) with small timing jitter time for coherent optical communication. The current–voltage relationship of the small Ir-TES, with an effective area of 7 μm × 7 μm, was measured, and its electrothermal feedback operation was confirmed. This device had a transition temperature of 280 mK, which is higher than that of bulk Ir, because of the wide contact area.
KeywordsTransition-edge sensor Small pixel Microcalorimeter
This work was financially supported by JSPS KAKENHI (Grant Numbers 15H02341 and 26630480).