Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/136038
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Ultrahigh Linearity of the Magnetic-Flux-to-Voltage Response of Proximity-Based Mesoscopic Bi-SQUIDs |
Author: | De Simoni, G. Ligato, N. Giazotto, F. Cassola, L. Tettamanzi, G.C. |
Citation: | Physical Review Applied, 2022; 18(1):1-8 |
Publisher: | American Physical Society (APS) |
Issue Date: | 2022 |
ISSN: | 2331-7019 2331-7019 |
Statement of Responsibility: | Giorgio De Simoni, Nadia Ligato, Francesco Giazotto, Lorenzo Cassola, and Giuseppe C. Tettamanzi |
Abstract: | Superconducting double-loop interferometers (bi-SQUIDs) have been introduced to produce magnetic flux sensors specifically designed to exhibit an ultrahighly linear voltage response as a function of the magnetic flux. These devices are very important for quantum sensing and for signal processing of signals oscillating in the radio-frequency range of the electromagnetic spectrum. Here, we report an Al doubleloop bi-SQUID based on proximitized mesoscopic Cu Josephson junctions. Such a scheme provides an alternative fabrication approach to conventional tunnel-junction-based interferometers, where the junction characteristics and, consequently, the magnetic-flux-to-voltage and magnetic-flux-to-critical-current device responses can be largely and easily tailored by the geometry of the metallic weak links. We discuss the performance of such sensors by showing a full characterization of the device switching current and voltage drop versus the magnetic flux for operation temperatures ranging from 30 mK to approximately 1 K. The figures of merit of the transfer function and of the total harmonic distortion are also discussed. The latter provides an estimate of the linearity of the flux-to-voltage device response, which attains values as large as 45 dB. Such a result lets us foresee a performance already on par with that achieved in conventional tunnel-junction-based bi-SQUIDs arrays composed of hundreds of interferometers. |
Keywords: | Condensed matter; Nanostructures; SQUID |
Rights: | © 2022 American Physical Society |
DOI: | 10.1103/physrevapplied.18.014073 |
Published version: | http://dx.doi.org/10.1103/physrevapplied.18.014073 |
Appears in Collections: | IPAS publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.