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Optimizing the Lumped Element Resonator via changing the total capacitance and the coplanar waveguide distance for effective magnon-photon coupling

POSTER

Abstract

Controllable superconducting quantum circuits with strong coupling strength is a key ingredient in the study of magnon-photon coupling in hybrid magnonic systems. The circuit's impedance is a crucial factor for optimizing the magnon-photon coupling as it strongly affects the current-flow pattern. Here, we explore the low-impedance lumped element resonator which is capacitively side-coupled to the signal line of a coplanar waveguide, by altering key parameters that were characterized with a triple-axis vector magnet at 1.5 K. The resonance frequencies are found to be inversely proportional to the circuit's total capacitance. The coupling strength is mostly affected by the distance between them. We identified a critical coupling strength, which suggests an optimal quality-factor along with a minimum insertion loss. Our studies reveal an alternative route to increase the susceptibility of magnon-photon coupling.

Presenters

  • Yuzan Xiong

    Department of Physics, Oakland University, Electronic and Computer Engineering, Oakland University

Authors

  • Yuzan Xiong

    Department of Physics, Oakland University, Electronic and Computer Engineering, Oakland University

  • Yi Li

    Materials Science Division, Argonne National Laboratory, Argonne National Laboratory, Argonne Natl Lab

  • Tomas Polakovic

    Argonne National Laboratory

  • Ralu Divan

    Center for Nanoscale Materials, Argonne, Argonne National Laboratory, Center for Nanoscale Materials,9700 S-Cass Avenue, Lemont, IL-60439, USA, Argonne National Lab

  • john pearson

    Argonne National Lab, Materials Science Division, Argonne National Laboratory, Argonne National Laboratory, Materials Science Division, Argonne Natl Lab, Argonne Natl Lab

  • Hongwei Qu

    Department of Electronic and Computer Engineering, Oakland University, Electronic and Computer Engineering, Oakland University

  • Zhili Xiao

    Argonne National Laboratory

  • Wai-Kwong Kwok

    Argonne National Laboratory, Material Sciences, Argonne National Laboratory, Argonne Natl Lab, Materials Science Division, Argonne National Laboratory, Materials Science Division, Argonne Natl Lab, Argonne National Lab

  • Wei Zhang

    Oakland University, Physics, Oakland University, Department of Physics, Oakland University, Electronic and Computer Engineering, Oakland University

  • Valentyn Novosad

    Argonne National Laboratory, Materials Science Division, Argonne National Laboratory, Materials Science Division & Physics Division, Argonne Natl Lab