Absorber Design and Optimization of Kinetic Inductance Detectors for the Terahertz Intensity Mapper

We discuss the design and optimization of the absorber for Terahertz Intensity Mapper, a balloon-borne kinetic inductance detector spectrometer. The novel “chain-link” absorber design offers excellent performance, independent optimization for both polarizations, and robust fabrication. Electromagnet...

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Bibliographic Details
Published in:Journal of low temperature physics 2022-11, Vol.209 (3-4), p.525-533
Main Authors: Nie, R., Janssen, R. M. J., Bradford, C. M., Filippini, J. P., Hailey-Dunsheath, S., McKenney, C. M., Aguirre, J. E., Bracks, J. S., Corso, A. J., Fu, J., Groppi, C., Hoh, J., Keenan, R. P., Liu, L.-J., Lowe, I. N., Marrone, D. P., Mauskopf, P., Redford, J., Trumper, I., Vieira, J. D.
Format: Article
Language:English
Subjects:
Absorbers
Characterization and Evaluation of Materials
Condensed Matter Physics
Design optimization
Inductance
Linear polarization
Low temperature physics
Magnetic Materials
Magnetism
Physics
Physics and Astronomy
Thickness
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Summary:We discuss the design and optimization of the absorber for Terahertz Intensity Mapper, a balloon-borne kinetic inductance detector spectrometer. The novel “chain-link” absorber design offers excellent performance, independent optimization for both polarizations, and robust fabrication. Electromagnetic simulations indicate in-band absorption efficiency over ∼ 90 % in both linear polarization modes. DC measurements on different film thicknesses indicate the desired sheet resistance.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-022-02755-3