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Development of dual-polarization LEKIDs for CMB observations

McCarrick, Heather, Abitbol, Maximilian H., Ade, Peter A.R. ORCID:, Barry, Peter, Bryan, Sean, Che, George, Day, Peter, Simon, Doyle, Flanigan, Daniel, Johnson, Bradley R., Jones, Glen, LeDuc, Henry G., Limon, Michele, Mauskopf, Philip ORCID:, Miller, Amber, Tucker, Carole ORCID: and Zmuidzinas, Jonas 2016. Development of dual-polarization LEKIDs for CMB observations. Presented at: SPIE Astronomical Telescopes + Instrumentation 2016, Edinburgh, Scotland, 26 June - 1 July 2016. Proceedings Volume 9914. Millimeter, Submillimeter, and Far Infrared Detectors and Instrumentation for Astronomy VIII. , vol.9914 SPIE, pp. 150-156. 10.1117/12.2231830

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We discuss the design considerations and initial measurements from arrays of dual-polarization, lumped-element kinetic inductance detectors (LEKIDs) nominally designed for cosmic microwave background (CMB) studies. The detectors are horn-coupled, and each array element contains two single-polarization LEKIDs, which are made from thin-film aluminum and optimized for a single spectral band centered on 150 GHz. We are developing two array architectures, one based on 160 micron thick silicon wafers and the other based on silicon-on-insulator (SOI) wafers with a 30 micron thick device layer. The 20-element test arrays (40 LEKIDs) are characterized with both a linearly-polarized electronic millimeter wave source and a thermal source. We present initial measurements including the noise spectra, noise-equivalent temperature, and responsivity. We discuss future testing and further design optimizations to be implemented.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: SPIE
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Last Modified: 11 Oct 2023 12:00

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