Design and Simulation of TiN-Based Suspended Meander Kinetic Inductance Detectors (KIDs) for Visible and Near-Infrared Astronomy Applications

We report on simulations of a novel design of optical design of optical titanium nitride (TiN)-based Kinetic Inductance Detectors (KIDs) in order to improve in order to improve their response to optical photons. We propose to separate the meander from the substrate to trap hot phonons generated by o...

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Bibliographic Details
Published in:Journal of low temperature physics 2024, Vol.216 (1-2), p.320-327
Main Authors: Appavou, Maria, Ribeiro, Lucas, Nicaise, Paul, Hu, Jie, Martin, Jean-Marc, Firminy, Josiane, Chaumont, Christine, Bonifacio, Piercarlo, Boussaha, Faouzi
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Cooper pairs
Inductance
Infrared astronomy
Infrared detectors
Instrumentation and Detectors
Magnetic Materials
Magnetism
Optical design
Phonons
Photons
Physics
Physics and Astronomy
Substrates
Titanium nitride
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Summary:We report on simulations of a novel design of optical design of optical titanium nitride (TiN)-based Kinetic Inductance Detectors (KIDs) in order to improve in order to improve their response to optical photons. We propose to separate the meander from the substrate to trap hot phonons generated by optical photons, preventing their rapid propagation through the substrate. These phonons would in turn contribute to the breaking of more Cooper pairs, thereby increasing the response of the detector. In our design, the meander is suspended a few hundred nanometers above the substrate. Furthermore, reflective gold (Au) or aluminum (Al)-based layers can be placed under the meander to improve photon coupling in the optical wavelengths.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-024-03138-6