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説明:

Detecting light at the single-photon level is one of the pillars of emergent photonic technologies. This is realized through state-of-the-art superconducting detectors that offer efficient, broadband and fast response. However, the use of superconducting thin films with low TC limits their operation temperature below 4K. In this work, we demonstrate proof-of-concept nanodetectors based on exfoliated, two-dimensional cuprate superconductor Bi2Sr2CaCu2O8-δ (BSCCO) that exhibit single-photon sensitivity at telecom wavelength at a record temperature of T = 20K. These non-optimized devices exhibit a slow (~ ms) reset time and a low detection efficiency (~ 10^(-4)). We realize the elusive prospect of single-photon sensitivity on a high-TC nanodetector thanks to a novel approach, combining van der Waals fabrication techniques and a non-invasive nanopatterning based on light ion irradiation. This result paves the way for broader application of single-photon technologies, relaxing the cryogenic constraints for single-photon detection at telecom wavelength.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Single-photon detectors, cuprate superconductor, telecom wavelength

刊行年月日: 2023-04-01

出版者: IOP Publishing

掲載誌:

• 2D Materials (ISSN: 20531583) vol. 10 issue. 2 021001

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1088/2053-1583/acb4a8

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更新時刻: 2025-02-13 16:30:19 +0900

MDRでの公開時刻: 2025-02-13 16:30:19 +0900