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RESEARCH PRODUCT
A Composite Phononic Crystal Design for Quasiparticle Lifetime Enhancement in Kinetic Inductance Detectors
Karwan RostemTuomas PuurtinenIlari MaasiltaP. J. De Vissersubject
Materials sciencePhysics - Instrumentation and DetectorsPhononFOS: Physical sciences02 engineering and technology01 natural sciencesCrystalResonatorCondensed Matter::Materials ScienceCondensed Matter::Superconductivity0103 physical sciencesGeneral Materials Science010306 general physicsSuperconductivityCondensed matter physicsPhonon scatteringAttenuationInstrumentation and Detectors (physics.ins-det)Computational Physics (physics.comp-ph)021001 nanoscience & nanotechnologyCondensed Matter PhysicsCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCrystal filterAtomic and Molecular Physics and OpticsQuasiparticleCondensed Matter::Strongly Correlated Electrons0210 nano-technologyPhysics - Computational Physicsdescription
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 um 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 simulations over a 40 dB attenuation in transmitted power is found for the crystal, which was previously estimated to give a lifetime enhancement of nearly two orders of magnitude.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-09-23 |