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Two-dimensional cuprate nanodetector with single telecom photon sensitivity at T = 20 K

Merino, R. L., Seifert, P., Duran Retamal, J., Mech, R., Taniguchi, T., Watanabe, K., Kadowaki, K., Hadfield, R. H. and Efetov, P. D. D. K. (2023) Two-dimensional cuprate nanodetector with single telecom photon sensitivity at T = 20 K. 2D Materials, 10, 021001. (doi: 10.1088/2053-1583/acb4a8)

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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 below 4 K. 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:Articles (Letter)
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hadfield, Professor Robert
Authors: Merino, R. L., Seifert, P., Duran Retamal, J., Mech, R., Taniguchi, T., Watanabe, K., Kadowaki, K., Hadfield, R. H., and Efetov, P. D. D. K.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:2D Materials
Publisher:IOP Publishing
ISSN:2053-1583
ISSN (Online):2053-1583
Published Online:19 January 2023
Copyright Holders:Copyright © 2023 The Author(s).
First Published:First published in 2D Materials 10:021001
Publisher Policy:Reproduced under a Creative Commons license

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