Fully Superconducting Josephson Bolometers for Gigahertz Astronomy

Paolucci, Federico and Ligato, Nadia and Germanese, Gaia and Buccheri, Vittorio and Giazotto, Francesco (2021) Fully Superconducting Josephson Bolometers for Gigahertz Astronomy. Applied Sciences, 11 (2). p. 746. ISSN 2076-3417

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Abstract

The origin and the evolution of the universe are concealed in the evanescent diffuse extragalactic background radiation (DEBRA). To reveal these signals, the development of innovative ultra-sensitive bolometers operating in the gigahertz band is required. Here, we review the design and experimental realization of two bias-current-tunable sensors based on one dimensional fully superconducting Josephson junctions: the nanoscale transition edge sensor (nano-TES) and the Josephson escape sensor (JES). In particular, we cover the theoretical basis of the sensors operation, the device fabrication, their experimental electronic and thermal characterization and the deduced detection performance. Indeed, the nano-TES promises a state-of-the-art noise equivalent power (NEP) of about 5×10−20 W/Hz−−−√, while the JES active region is expected to show an unprecedented NEP of the order of 10−25 W/Hz−−−√. Therefore, the nano-TES and JES are strong candidates to push radio astronomy to the next level.

Item Type: Article
Subjects: AP Academic Press > Engineering
Depositing User: Unnamed user with email support@apacademicpress.com
Date Deposited: 09 Jan 2023 09:21
Last Modified: 31 May 2024 09:51
URI: http://info.openarchivespress.com/id/eprint/52

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