Suppressed-gap millimetre wave kinetic inductance detectors using DC-bias current
Publication Date
2020Journal Title
JOURNAL OF PHYSICS D-APPLIED PHYSICS
ISSN
0022-3727
Publisher
IOP Publishing
Volume
53
Issue
34
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Zhao, S., Withington, S., Goldie, D., & Thomas, C. (2020). Suppressed-gap millimetre wave kinetic inductance detectors using DC-bias current. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 53 (34) https://doi.org/10.1088/1361-6463/ab8d6d
Description
Funder: CSC Cambridge Scholarship
Abstract
In this study, we evaluate the suitability of using DC-biased aluminium
resonators as low-frequency kinetic inductance detectors operating in the
frequency range of 50 - 120 GHz. Our analysis routine for supercurrent-biased
resonators is based on the Usadel equations and gives outputs including density
of states, complex conductivities, transmission line properties, and
quasiparticle lifetimes. Results from our analysis confirm previous
experimental observations on resonant frequency tuneability and retention of
high quality factor. Crucially, our analysis suggests that DC-biased resonators
demonstrate significantly suppressed superconducting density of states gap.
Consequently these resonators have lower frequency detection threshold and are
suitable materials for low-frequency kinetic inductance detectors.
Keywords
Paper, Condensed matter, DC-bias, superconducting resonators, kinetic inductance detectors
Sponsorship
Science and Technology Facilities Council (ST/R00062X/1)
Identifiers
dab8d6d, ab8d6d, jphysd-123645.r1
External DOI: https://doi.org/10.1088/1361-6463/ab8d6d
This record's URL: https://www.repository.cam.ac.uk/handle/1810/334086
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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