Ultra-sensitive super-THz microwave kinetic inductance detectors for
future space-based observatories

Jochem J. A. Baselmans; Federica Facchin; Juan Bueno; Nuria Llombart; David Thoen; Vignesh Murugesan; Steven de Rooij; Pieter de Visser

doi:10.1117/12.2629846

26 August 2022 Ultra-sensitive super-THz microwave kinetic inductance detectors for future space-based observatories

Jochem J. A. Baselmans, Federica Facchin, Juan Bueno, Nuria Llombart, David Thoen, Vignesh Murugesan, Steven de Rooij, Pieter de Visser

Author Affiliations +

Proceedings Volume PC12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI; PC121900E (2022) https://doi.org/10.1117/12.2629846
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

Future cold space borne observatories for the far infrared, such as the Origins Space Telescope, require large arrays of extremely sensitive detector operating in a 1-10 THz band. We present the design, fabrication and characterisation of microwave kinetic inductance detectors (MKIDs) with a high optical coupling efficiency and a noise equivalent power NEP = 4 ⋅ 10^-20 W/√Hz, measured using a thermal calibration source band-pass filtered in a narrow band around 1.55 THz. The devices are antenna-coupled NbTiN-aluminium hybrid MKIDs, optimised for a low NEP, high responsivity and super-THz operation. Key is the use of a very small aluminium volume of ~5 μm3 for radiation absorption, increasing the responsivity by capacitively loading the NbTiN coplanar waveguide section of the resonator and using a thin membrane for the aluminium coplanar waveguide where the THz radiation is absorbed.

Conference Presentation

Citation Download Citation

Jochem J. A. Baselmans, Federica Facchin, Juan Bueno, Nuria Llombart, David Thoen, Vignesh Murugesan, Steven de Rooij, and Pieter de Visser "Ultra-sensitive super-THz microwave kinetic inductance detectors for future space-based observatories", Proc. SPIE PC12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI, PC121900E (26 August 2022); https://doi.org/10.1117/12.2629846

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KEYWORDS

Sensors

Inductance

Microwave radiation

Observatories

Aluminum

Antennas

Phonons

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