A compact kinetic inductance travelling wave parametric amplifier with continuous periodic loading structure

Joseph C. Longden; Christine Chaumont; Faouzi Boussaha; Boon-Kok Tan

doi:10.1117/12.2627037

31 August 2022 A compact kinetic inductance travelling wave parametric amplifier with continuous periodic loading structure

Joseph C. Longden, Christine Chaumont, Faouzi Boussaha, Boon-Kok Tan

Author Affiliations +

Proceedings Volume 12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI; 121902X (2022) https://doi.org/10.1117/12.2627037
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

Travelling wave parametric amplifiers (TWPAs) made from highly non-linear reactive superconducting thin films have been demonstrated to be a potentially viable quantum-noise-limited amplifier technology for various fundamental physics platforms, including microwave/mm/sub-mm astronomy, dark matter search experiments, neutrino mass experiments, and qubit readout. We present a kinetic inductance TWPA consisting of a patterned titanium nitride film on a sapphire substrate, which comprises a coplanar waveguide (CPW) with a continuous, smoothed periodic loading (PL) structure that modulates the characteristic impedance of the CPW in a double sinusoidal fashion. This double sinusoidal modulation creates much stronger dispersion features than a conventional PL design, which allows for phase matching and pump harmonic suppression over a much shorter transmission length, potentially leading to reduced losses. In this paper, we shall discuss in detail the design of our TWPA and present the predicted gain-bandwidth characteristics from electromagnetic simulations.

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Joseph C. Longden, Christine Chaumont, Faouzi Boussaha, and Boon-Kok Tan "A compact kinetic inductance travelling wave parametric amplifier with continuous periodic loading structure", Proc. SPIE 12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI, 121902X (31 August 2022); https://doi.org/10.1117/12.2627037

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