Ashworth, Patrick, Barry, Peter S., Benson, Chris S., Gordon-Moys, Harry and Morris, Izaak
2026.
On-chip resonator for nonlinear kinetic inductance characterisation and future spectrometry applications.
IEEE Transactions on Applied Superconductivity
36
(6)
, 3500906.
10.1109/tasc.2026.3682586
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Abstract
This work focuses on the development and demonstration of tunable superconducting on-chip resonator, leveraging the intrinsic current-dependent non-linear kinetic inductance of superconducting aluminium, and investigating the effect of oxygen content. Thin films are deposited using standard metal evaporation. We present results from a comprehensive study based on a series of evaporated Al thin films. This research aims to inform and constrain optimisation strategies for the design of mm-wave on-chip spectrometers, particularly regarding yield, resolution, and efficiency. By systematically varying film stoichiometry, we use a series of DC measurements to extract fundamental film properties such as resistivity, critical current and critical temperature. Furthermore, we employ low-loss DC-coupled microwave resonators to characterise both their microwave properties and the non-linear kinetic inductance, comparing these findings to a determined non-linear kinetic model. Finally, we discuss the possibility of usage in a parametric amplifier.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Additional Information: | License information from Publisher: LICENSE 1: URL: https://ieeexplore.ieee.org/Xplorehelp/downloads/license-information/IEEE.html, Start Date: 2026-01-01# RRS applied (AB 15/05/26) |
| Publisher: | Institute of Electrical and Electronics Engineers |
| ISSN: | 1051-8223 |
| Funders: | STFC, UKRI |
| Date of First Compliant Deposit: | 15 May 2026 |
| Date of Acceptance: | 31 March 2026 |
| Last Modified: | 05 Aug 2026 12:45 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/186623 |
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