A1 Journal article (refereed)
A Composite Phononic Crystal Design for Quasiparticle Lifetime Enhancement in Kinetic Inductance Detectors (2020)

Puurtinen, T. A., Rostem, K., de Visser, P. J., & Maasilta, I. J. (2020). A Composite Phononic Crystal Design for Quasiparticle Lifetime Enhancement in Kinetic Inductance Detectors. Journal of Low Temperature Physics, 199(3-4), 577-584. https://doi.org/10.1007/s10909-020-02423-4

JYU authors or editors

Publication details

All authors or editorsPuurtinen, T. A.; Rostem, K.; de Visser, P. J.; Maasilta, I. J.

Journal or seriesJournal of Low Temperature Physics



Publication year2020


Issue number3-4

Pages range577–584


Publication countryUnited States

Publication languageEnglish


Publication open accessOpenly available

Publication channel open accessPartially open access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/68237

Web address of parallel published publication (pre-print)https://arxiv.org/abs/1909.10316


A nanoscale phononic crystal filter (reflector) is designed for a kinetic inductance detector where the reflection band is matched to the quasiparticle recombination phonons with the aim to increase quasiparticle lifetime in the superconducting resonator. The inductor is enclosed by a 1-μm-wide phononic crystal membrane section with two simple hole patterns that each contain a partial spectral gap for various high-frequency phonon modes. The phononic crystal is narrow enough for low-frequency thermal phonons to propagate unimpeded. With 3D phonon scattering simulation over a 40 dB attenuation in transmitted power is found for the crystal, which is estimated to give a lifetime enhancement of nearly two orders of magnitude.

Keywordsphononsfinite element methodheat conduction

Free keywordsphononic crystal; kinetic inductance detector; finite element method; phonon scattering

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Ministry reportingYes

Reporting Year2020

JUFO rating1

Last updated on 2024-22-04 at 23:21