Kavli Affiliate: Herre S. J. Van Der Zant
| First 5 Authors: Matteo Arfini, Alvaro Bermejillo-Seco, Artem Bondarenko, Clinton A. Potts, Yaroslav M. Blanter
| Summary:
We experimentally and theoretically demonstrate that nonlinear spin-wave
dynamics can induce an effective resonant interaction between non-resonant
magnon modes in a yttrium iron garnet disk. Under strong pumping near the
ferromagnetic resonance mode, we observe a spectral splitting that emerges with
increasing drive amplitude. This phenomenon is well captured by a theoretical
framework based on the linearization of a magnon three-wave mixing Hamiltonian,
which at high power leads to parametric Suhl instabilities. The access and
control of nonlinear magnon-parametric processes enables the development of
experimental platforms in an unexplored parameter regime for both classical and
quantum computation protocols.
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