Journal
JOURNAL OF LOW TEMPERATURE PHYSICS
Volume 199, Issue 3-4, Pages 577-584Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10909-020-02423-4
Keywords
Phononic crystal; Kinetic inductance detector; Finite element method; Phonon scattering
Categories
Ask authors/readers for more resources
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-mu m-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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available