Magnon-Magnon Interaction Induced by Nonlinear Spin-Wave Dynamics
Matteo Arfini (Kavli institute of nanoscience Delft, TU Delft - Applied Sciences)
Alvaro Bermejillo-Seco (TU Delft - Applied Sciences)
Artem Bondarenko (Kavli institute of nanoscience Delft, TU Delft - Applied Sciences)
Clinton A. Potts (TU Delft - Applied Sciences, University of Copenhagen)
Yaroslav M. Blanter (Kavli institute of nanoscience Delft, TU Delft - Applied Sciences)
Herre S.J. van der Zant (TU Delft - Applied Sciences, Kavli institute of nanoscience Delft)
Gary A. Steele (Kavli institute of nanoscience Delft, TU Delft - Applied Sciences)
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Abstract
We experimentally and theoretically demonstrate that nonlinear spin-wave dynamics can induce an effective resonant interaction between nonresonant 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 enable the development of experimental platforms in an unexplored parameter regime for both classical and quantum computation protocols.