Engineering the thin film characteristics for optimal performance of superconducting kinetic inductance amplifiers using a rigorous modelling technique

نویسندگان

چکیده

Background: Kinetic Inductance Travelling Wave Parametric Amplifiers (KITWPAs) are a new variant of superconducting amplifier that can potentially achieve high gain with quantum-limited noise performance over broad bandwidth, which is important for many ultra-sensitive experiments. In this paper, we present novel modelling technique better capture the electromagnetic behaviour KITWPA without translation symmetry assumption, allowing us to flexibly explore use more complex transmission line structures and predict their performance. Methods: order design optimal performance, investigate different thin film materials, compare pros cons in forming high-gain low-loss medium feasible amplification. We establish if thickness be controlled precisely, material used has less impact on device, as long it topologically defect-free operating within its regime. With insight, propose Titanium Nitride (TiN) our critical temperature easily altered suit applications. further topological effect commonly TiN film, including various non-conducting materials required form amplifier. Results: Both these comprehensive studies led two configurations KITWPA: 1) A 100 nm thick coplanar waveguide amplifier, 2) compact 50 inverted microstrip amplifier. utilise described first part paper operational setup broadest bandwidth both KITWPAs, loss. Conclusions: Finally, conclude actual layout predicted gain-bandwidth product KITWPAs.

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ژورنال

عنوان ژورنال: Open research Europe

سال: 2022

ISSN: ['2732-5121']

DOI: https://doi.org/10.12688/openreseurope.14860.1