Analysis of visible to near-infrared hybrid NbTiN/beta-Ta LEKIDs

Kevin Kouwenhoven; Steven A. H. de Rooij; Enrico Biancalani; Daniel Fan; Carlas S. Smith; Vignesh Murugesan; David J. Thoen; Jochem J. A. Baselmans; Pieter J. de Visser

doi:10.1117/12.2629220

29 August 2022 Analysis of visible to near-infrared hybrid NbTiN/beta-Ta LEKIDs

Kevin Kouwenhoven, Steven A. H. de Rooij, Enrico Biancalani, Daniel Fan, Carlas S. Smith, Vignesh Murugesan, David J. Thoen, Jochem J. A. Baselmans, Pieter J. de Visser

Author Affiliations +

Proceedings Volume 12191, X-Ray, Optical, and Infrared Detectors for Astronomy X; 1219107 (2022) https://doi.org/10.1117/12.2629220
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

Superconducting Microwave Kinetic Inductance Detectors (MKIDs) are superconducting, photon-counting, and energy-resolving detectors for visible to near-infrared wavelengths. We present the analysis of a hybrid Lumped Element (LEKID) design with a beta-phase Ta inductor. We show that the measured KID response matches a response model based on the complex conductivity and material parameters. The signal-to-noise is limited by the devices' microwave power handling, the very fast pulse decay, and saturation of the KID phase response. We will present our follow-up design optimized for higher power handling and with a larger inductor volume to reduce the response saturation.

Conference Presentation

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Kevin Kouwenhoven, Steven A. H. de Rooij, Enrico Biancalani, Daniel Fan, Carlas S. Smith, Vignesh Murugesan, David J. Thoen, Jochem J. A. Baselmans, and Pieter J. de Visser "Analysis of visible to near-infrared hybrid NbTiN/beta-Ta LEKIDs", Proc. SPIE 12191, X-Ray, Optical, and Infrared Detectors for Astronomy X, 1219107 (29 August 2022); https://doi.org/10.1117/12.2629220

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