A1 Journal article (refereed)
Hypersensitive Tunable Josephson Escape Sensor for Gigahertz Astronomy (2020)

Paolucci, F., Ligato, N., Buccheri, V., Germanese, G., Virtanen, P., & Giazotto, F. (2020). Hypersensitive Tunable Josephson Escape Sensor for Gigahertz Astronomy. Physical Review Applied, 14(3), Article 034055. https://doi.org/10.1103/PhysRevApplied.14.034055

JYU authors or editors

Publication details

All authors or editors: Paolucci, Federico; Ligato, Nadia; Buccheri, Vittorio; Germanese, Gaia; Virtanen, Pauli; Giazotto, Francesco

Journal or series: Physical Review Applied

ISSN: 2331-7019

eISSN: 2331-7019

Publication year: 2020

Volume: 14

Issue number: 3

Article number: 034055

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevApplied.14.034055

Publication open access: Not open

Publication channel open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/72599

Publication is parallel published: https://arxiv.org/abs/2003.05966


Single-photon detectors and bolometers represent the bridge between different topics in science, such as quantum computation, astronomy, particle physics, and biology. Nowadays, superconducting bolometers and calorimeters are the most-sensitive detectors in the terahertz and subterahertz bands. Here, we propose and demonstrate a Josephson escape sensor (JES) that could find natural application in astrophysics. The JES is composed of a fully superconducting one-dimensional Josephson junction, whose resistance-versus-temperature characteristics can be precisely controlled by a bias current. Therefore, differently from traditional superconducting detectors, the JES sensitivity and working temperature can be in situ simply and finely tuned depending on the application requirements. A JES bolometer is expected to show an intrinsic thermal-fluctuation-noise noise-equivalent power on the order of
10−25 W/Hz1/2, while a JES calorimeter could provide a frequency resolution of about 2 GHz, as deduced from the experimental data. In addition, the sensor can operate at the critical temperature (i.e., working as a conventional transition-edge sensor), with a noise-equivalent power of approximately 6×10−20 W/Hz1/2 and a frequency resolution of approximately 100 GHz.

Keywords: astrophysics; research equipment; detectors; superconductors

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Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 2

Last updated on 2022-20-09 at 13:21