Probing strong magnon-magnon coupling in a magnonic hybrid system

ORAL

Abstract

Magnon based hybrid systems have attracted increasing interest due to their potential application in coherent information processing. We demonstrate electrical and optical detection of hybrized magnon-magnon dynamics in exchange-coupled nm-thick yttrium iron garnet/permalloy (YIG/Py) bilayer devices using spin rectification and Brillouin light scattering at room temperature.  The  uniform mode in  the  conductive  Py  layer  and  the first perpendicular standing spin-wave modes in the insulating YIG layer are coupled through interfacial exchange. We observe a magnon-magnon coupling strength of 9 mT for YIG(84 nm)/Py(10 nm). The introduction of a thin insulating SiO$_2$ layer between YIG and Py strongly suppresses the hybrid dynamics. Our work explores hybrid magnonic dynamics that are important in the implementation of coherent data processing.

*We acknowledge support by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DE-SC0020308.

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Presenters

  • Dinesh Wagle

    • Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, United States
    • University of Delaware

Authors

  • Dinesh Wagle

    • Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, United States
    • University of Delaware

  • Yi Li

    • Argonne National Laboratory

  • Mojtaba Taghipour Kaffash

    • University of Delaware

  • Sergi Lendinez

    • University of Delaware
    • Nanofabrication Facility, Louisiana State University, Baton Rouge, LA 70806, United States
    • Louisiana State University

  • Mohammad Tomal Hossain

    • University of Delaware

  • Valentyn Novosad

    • Argonne National Laboratory

  • Matthias Benjamin Jungfleisch

    • University of Delaware
    • Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, United States