Development of high-effective superconducting single-photon detectors aimed for mid-IR spectrum range

We report on development of superconducting single-photon detectors (SSPD) with high intrinsic quantum efficiency in the wavelength range 1.31 - 3.3 μm. By optimization of the NbN film thickness and its compound, we managed to improve detection efficiency of the detectors in the range up to 3.3 μm....

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Bibliographic Details
Published in:Journal of physics. Conference series 2017-11, Vol.917 (6), p.62037
Main Authors: Zolotov, P I, Divochiy, A V, Vakhtomin, Yu B, Morozov, P V, Seleznev, V A, Smirnov, K V
Format: Article
Language:English
Subjects:
Detectors
Film thickness
Niobium nitride
Optimization
Photons
Physics
Quantum efficiency
Sensors
Superconductivity
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Summary:We report on development of superconducting single-photon detectors (SSPD) with high intrinsic quantum efficiency in the wavelength range 1.31 - 3.3 μm. By optimization of the NbN film thickness and its compound, we managed to improve detection efficiency of the detectors in the range up to 3.3 μm. Optimized devices showed intrinsic quantum efficiencies as high as 10% at mid-IR range.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/917/6/062037