Tantalum nitride superconducting single-photon detectors with low cut-off energy

Abstract

Materials with a small superconducting energy gap are expected to favor a high detection efficiency of low-energy photons in superconducting nanowire single-photon detectors. We developed a TaN detector with smaller gap and lower density of states at the Fermi energy than in comparable NbN devices, while other relevant parameters remain essentially unchanged. The observed reduction of the minimum photon energy required for direct detection is in line with model predictions of $\approx 1/3$ as compared to NbN.

9 pages incl. 1 table and 2 figures; corrected typos in table 1

References in corpus (6)

• Single-photon detectors based on ultra-narrow superconducting nanowires
• Electrothermal feedback in superconducting nanowire single-photon detectors
• Probability of the resistive state formation caused by absorption of a single-photon in current-carrying superconducting nano-strips
• Current Assisted, Thermally Activated Flux Liberation in Ultrathin Nanopatterned NbN Superconducting Meander Structures
• Temperature Dependent Performances of Superconducting Nanowire Single-Photon Detectors in an Ultralow-Temperature Region
• Niobium superconducting nanowire single-photon detectors

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