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.

*The thin-film fabrication and low-temperature measurement were supported by the DOE, Materials Science and Engineering Division. The experimental design and analytical modeling were supported by AFOSR under grant no. FA9550-19-1-0254. The use of the CNM, an Office of Science user facility, was supported by the U.S. DOE, BES, under Contract No. DE-AC02-06CH11357.

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