Analyzing and modeling of an ultra-compact superconducting resonator for kinetic inductance detectors applications

S. Mohammad Hassan Javadzadeh | Morteza Heidari

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URL :   http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=159064
Date :  2022/01/15
Publish in :    Physica C: Superconductivity and its Applications
DOI :  https://doi.org/https://doi.org/10.1016/j.physc.2021.1353987
Link :  https://doi.org/10.1016/j.physc.2021.1353987
Keywords :High Quality Factor; Kinetic Inductance Detector; Microwave Inductor Model; Microwave Resonator; Superconducting Resonator

Abstract :

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Microwave Kinetic Inductance Detectors (MKIDs) are a superconducting photon detection technology which is usually developed for cosmological applications. In this study, we work on developing theoretical and linear models of a new microwave inductor structure which is used at Lumped Element Kinetic Inductance Detector (LEKID). As we know, one of the most important and key development criteria for photon detectors is improving unloaded quality factor of superconducting resonators. By using this microwave inductor, interdigital capacitor and simulating titanium-nitride on silicon, we designed a micro-resonator that has an intrinsic quality factor about 2.5  106 in dimensions of 208 μm  219 μm at the frequency of 3.56 GHz. Although we added more capacitors fingers to reduce the resonance frequency, the overall structure still has tiny dimensions. The small size makes this resonator eligible to use in large arrays spectrometry devices. The accuracy of the studies in this article has been assessed by electromagnetic full wave softwares.