ORCID: https://orcid.org/0000-0003-3701-8119; Kadowaki, Kazuo; Hadfield, Robert H.
ORCID: https://orcid.org/0000-0002-8084-4187 and Efetov, Dmitri K.
ORCID: https://orcid.org/0000-0001-5862-0462
(2023):
Two-dimensional cuprate nanodetector with single telecom photon sensitivity at T = 20 K.
In: 2D Materials, Vol. 10, No. 2, 021001
[PDF, 1MB]
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.
Item Type: | Journal article |
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Faculties: | Physics |
Subjects: | 500 Science > 530 Physics |
URN: | urn:nbn:de:bvb:19-epub-107471-5 |
ISSN: | 2053-1583 |
Language: | English |
Item ID: | 107471 |
Date Deposited: | 20. Oct 2023, 10:48 |
Last Modified: | 20. Oct 2023, 10:49 |