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Published August 2, 2022 | public
Journal Article

Absorber Design and Optimization of Kinetic Inductance Detectors for the Terahertz Intensity Mapper

Abstract

We discuss the design and optimization of the absorber for Terahertz Intensity Mapper, a balloon-borne kinetic inductance detector spectrometer. The novel "chain-link" absorber design offers excellent performance, independent optimization for both polarizations, and robust fabrication. Electromagnetic simulations indicate in-band absorption efficiency over ∼90% in both linear polarization modes. DC measurements on different film thicknesses indicate the desired sheet resistance.

Additional Information

© The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2022. Received: 1 November 2021 / Accepted: 13 May 2022 / Published 15 June 2022. TIM is supported by NASA under grant 80NSSC19K1242, issued through the Science Mission Directorate. R.M.J. Janssen is supported by an appointment to the NASA Postdoctoral Program at the NASA Jet Propulsion Laboratory, administered by Universities Space Research Association under contract with NASA. The material presented in this work was carried out in part in the Micro-Nano-Mechanical Systems Cleanroom Laboratory within the Department of Mechanical Science and Engineering at the University of Illinois. The SEM imaging and T꜀ measurements were carried out in part in the Materials Research Laboratory Central Research Facilities, University of Illinois. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004).

Additional details

Created:
August 22, 2023
Modified:
October 24, 2023