Contribution of dielectrics to frequency and noise of NbTiN superconducting resonators
R. Barends, H. L. Hortensius, T. Zijlstra, J. J. A. Baselmans, S. J., C. Yates, J. R. Gao, and T. M. Klapwijk
TL;DR
This study investigates how dielectric layers affect the frequency and noise characteristics of NbTiN superconducting resonators, revealing non-monotonic frequency behavior and noise independence from dielectric thickness.
Contribution
It provides new insights into the impact of dielectric layers on superconducting resonator performance, especially regarding frequency shifts and noise sources.
Findings
Resonance frequency shows non-monotonic temperature dependence with dielectric layers.
Noise levels are unaffected by dielectric layer thickness.
Frequency behavior is influenced by dielectric properties, not just temperature.
Abstract
We study NbTiN resonators by measurements of the temperature dependent resonance frequency and frequency noise. Additionally, resonators are studied covered with SiOx dielectric layers of various thicknesses. The resonance frequency develops a non-monotonic temperature dependence with increasing SiOx layer thickness. The increase in the noise is independent of the SiOx thickness, demonstrating that the noise is not dominantly related to the low temperature resonance frequency deviations.
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Taxonomy
TopicsMechanical and Optical Resonators · Advanced Fiber Laser Technologies · Photonic and Optical Devices