@article{10902/31908,
year = {2024},
month = {1},
url = {https://hdl.handle.net/10902/31908},
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.},
organization = {This work was supported in part by the Centro de Astrobiología and IMDEA-Nanociencia under Grant PID2019-105552RBC41 and Grant PID2019-105552RB-C44, in part by the Comunidad de Madrid under Grant P2018/NMT-4291 TEC2SPACE-CM, in part by the “Severo Ochoa” Programme for Centers of Excellence in Research and Development under Grant SEV-2016-0686, in part by the CSIC Research Platform under Grant PTI-001, and in part by the Comunidad de Madrid, the Recovery, Transformation and Resilience Plan from the Spanish State, and NextGenerationEU from the EU Recovery and Resilience Facility through the Project “Tecnologías avanzadas para la exploración del Universo y sus componentes” under Grant PR47/21 TAU-CM. The work of Universidad de Cantabria was supported by the Ministry of Science and Innovation under Grant PID2019 110610RB-C22. All groups were partially funded by the Research Network under Grant RED2022-134839-T.},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
publisher = {IEEE Transactions on Microwave Theory and Techniques, 2024, 72(1), 648-658},
publisher = {IEEE MTT-S International Microwave Symposium (IMS), San Diego, California, USA, 2023},
title = {Optimized cross-polarized LEKIDs for W-band using sawtooth inductors},
author = {Calero de Ory, Marina and Rodriguez, David and Villa Benito, Enrique and Fuente Rodríguez, Luisa María de la and Aja Abelán, Beatriz and Rollano García, Víctor and Magaz Pérez, María Teresa and Pascual Gutiérrez, Juan Pablo and Granados Ruiz, Daniel and Artal Latorre, Eduardo and Gómez Gutiérrez, Alicia},
}