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Optimized cross-polarized LEKIDs for W-band using sawtooth inductors

Abstract: Lumped-element kinetic inductance detectors (LEKIDs) based on sawtooth inductors for $W$ -band are presented in this article. A careful analysis is carried out for the cross-polarization in the inductor geometry, which brings out the absorption of the nondesired $E$ -field component of an incident wave plane. The proposed inductor geometry with sawtooth sections demonstrates improved cross-polarization. The analytical results are verified by comparison with 3-D electromagnetic (EM) simulations. As the first proof of concept, $W$ -band optical response is demonstrated through quasioptical characterization at room temperature of an aluminum LEKID array. Moreover, a LEKID array based on bilayer superconducting titanium/aluminum (Ti/Al) thin film is developed for evaluating the performance at millikelvin temperatures. Darkness characterization confirms the high-quality factor of the fabricated detectors and the low-frequency design reliability. In addition, cryogenic optical experiments are performed for spectroscopic and detector sensitivity characterization. The proposed geometry opens the possibility of developing large-format polarimetric cameras based on on-chip LEKID structures for future astronomical experiments.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: De Ory M.C., Rodriguez D., Villa E., De La Fuente L., Aja B., Rollano V., Magaz M.T., Pascual J.P., Granados D., Artal E., Gomez A.,

 Congreso: IEEE MTT-S International Microwave Symposium: IMS (2023 : San Diego, Estados Unidos)

 Fuente: IEEE Transactions on Microwave Theory and Techniques, 72(1), 648-658

Editorial: Institute of Electrical and Electronics Engineers Inc.

 Fecha de publicación: 01/01/2024

Nº de páginas: 11

Tipo de publicación: Artículo de Revista

 DOI: 10.1109/TMTT.2023.3334816

ISSN: 0018-9480,1557-9670

 Proyecto español: PID2019-105552RBC41

Url de la publicación: https://doi.org/10.1109/TMTT.2023.3334816

Autoría

DE ORY, MARINA C.

RODRÍGUEZ, DAVID

ROLLANO, VICTOR

MAGAZ, MARÍA TERESA

GRANADOS, DANIEL

GÓMEZ, ALICIA