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- Autorinnen/Autoren:
- Merino, Rafael Luque; Seifert, Paul; Retamal, José Durán; Mech, Roop K.; Taniguchi, Takashi; Watanabe, Kenji; Kadowaki, Kazuo; Hadfield, Robert H.; Efetov, Dmitri K.
- Dokumenttyp:
- Zeitschriftenartikel / Journal Article
- Titel:
- Two-dimensional cuprate nanodetector with single telecom photon sensitivity at T = 20 K
- Zeitschrift:
- 2D Materials
- Jahrgang:
- 10
- Heftnummer:
- 2
- Jahr:
- 2023
- Sprache:
- Englisch
- Stichwörter:
- 2D ; cuprate ; nanodetector ; telecom ; photon ; nanowire ; He-FIB
- Abstract:
- 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 low TC superconducting thin films limits their operation temperature to approximately 4 K and below. Here, we demonstrate proof-of-concept nanodetectors based on exfoliated, two-dimensional cuprate superconductor Bi2Sr2CaCu2O8-δ that exhibit single-photon sensitivity at telecom wavelength at a record temperature of T = 20 K. 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.
- ISSN:
- 2053-1583
- DOI:
- 10.1088/2053-1583/acb4a8
- Fakultät:
- Fakultät für Elektrotechnik und Informationstechnik
- Institut:
- EIT 2 - Institut für Physik
- Professorin/Professor:
- Seifert, Paul
- Open Access:
- Ja / Yes
- Open-Access-Lizenz:
- CC BY 4.0
- URL zur Lizenz:
- https://creativecommons.org/licenses/by/4.0/
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