Examinando por Autor "Artal, E."

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Analysis and Performance of Lumped-Element Kinetic Inductance Detectors for W-Band
(Institute of Electrical and Electronics Engineers, 2021-01-03) Aja, B.; De Ory, M. C.; De la Fuente, L.; Artal, E.; Pascual, J. P.; Teresa Magaz, M.; Granados, D.; Gómez, A.; Agencia Estatal de Investigación (AEI); Comunidad de Madrid; Aja, B. [0000-0002-4229-2334]; De la Fuente, L. [0000-0003-1403-1660]; Artal, E. [0000-0002-2569-1894]; Pascual, J. P. [0000-0003-2123-0502]; Granados, D. [0000-0001-7708-9080]; Gómez, A. [0000-0002-8752-1401]; Centros de Excelencia Severo Ochoa, INSTITUTO MADRILEÑO DE ESTUDIOS AVANZADOS EN NANOCIENCIA, SEV-2016-0686
Lumped-element superconducting resonators are a promising technology for their use in millimeter-wave observations and quantum computing applications that require large arrays of extremely sensitive detectors. Among them, lumped-element kinetic inductance detectors (LEKIDs) have shown good performance in the submillimeter band in several earth-based telescopes. In this work, LEKIDs for their use as millimeter-wave receivers of astronomical applications are presented. LEKID arrays using a thin bilayer of superconducting titanium/aluminum (Ti/Al), deposited on the silicon substrate, have been designed and fabricated. The design of a dual-polarization LEKID with the goal of detection at the W-band for two orthogonal polarizations is described and a fabricated array has demonstrated absorption at ambient temperature. Also, an approximate design methodology of the coupling parameter for LEKIDs' readout, essential for dynamic range optimization of the detector under millimeter-wave radiation, is proposed. In addition, the resonance characteristics and coupling factor of the fabricated superconducting resonators using high-quality internal factor Q i under cryogenic temperatures have been analyzed. The design guidelines in this work are applicable to other LEKID arrays, and the presented superconducting Ti/Al thin-film LEKIDs can be used in future receiver arrays in the millimeter bands.