6533b85afe1ef96bd12b9970
RESEARCH PRODUCT
A Composite Phononic Crystal Design for Quasiparticle Lifetime Enhancement in Kinetic Inductance Detectors
T. A. PuurtinenK. RostemP. J. De VisserI. J. Maasiltasubject
elementtimenetelmäCondensed Matter::Materials ScienceCondensed Matter::Superconductivitylämmön johtuminenphononic crystalkinetic inductance detectorfinite element methodphonon scatteringCondensed Matter::Strongly Correlated ElectronsCondensed Matter::Mesoscopic Systems and Quantum Hall Effectfononitdescription
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. peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-01-01 |