Design and Performance of the Antenna-Coupled Lumped-Element Kinetic Inductance Detector

Journal Article · Thu Nov 15 00:00:00 EST 2018 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/S10909-018-1943-Y· OSTI ID:22809871

Doyle, S.; Hornsby, A. L. ^[1]; Kofman, A. ^[2]; Mayer, E. ^[3]; Nadolski, A. ^[2]; Tang, Q. Y. ^[3]; Vieira, J. ^[2]; Shirokoff, E. ^[3]

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1. Cardiff University, School of Physics and Astronomy (United Kingdom)
2. University of Illinois, Astronomy Department (United States)
3. University of Chicago, Kavli Institute for Cosmological Physics (United States)

Focal plane arrays consisting of low-noise, polarisation-sensitive detectors have made possible the pioneering advances in the study of the cosmic microwave background (CMB). To make further progress, the next generation of CMB experiments (e.g. CMB-S4) will require a substantial increase in the number of detectors compared to current instruments. Arrays of kinetic inductance detectors (KIDs) provide a possible path to realising such large-format arrays owing to their intrinsic multiplexing advantage and relative cryogenic simplicity. In this paper, we report on the design of a variant of the traditional KID design: the antenna-coupled lumped-element KID. A polarisation-sensitive twin-slot antenna placed behind an optimised hemispherical lens couples power onto a thin-film superconducting microstrip line. The power is then guided into the inductive section of an aluminium KID, where it is absorbed and modifies both the resonant frequency and quality factor of the KID. We present the various aspects of the design and preliminary results from the first set of seven-element prototype arrays and compare to the expected modelled performance.

• OSTI ID: 22809871
• Journal Information: Journal of Low Temperature Physics, Vol. 193, Issue 3-4; Conference: LTD17: International workshop on low temperature detectors, Kurume City, Fukuoka (Japan), 17-21 Jul 2017; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; Article Copyright (c) 2018 The Author(s); http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
ANTENNAS
CRYOGENICS
DESIGN
FORMATES
INDUCTANCE
MICROWAVE RADIATION
NOISE
PERFORMANCE
POLARIZATION
QUALITY FACTOR
THIN FILMS