Design of Hybrid Magnonic Systems by Dynamical Phase-field Modeling

Hybrid magnonic systems rely on the dynamical, bidirectional energy exchange between magnons and other types of elementary excitations (quasi-particles) such as phonons, photons, and electrons, which can be exploited for a wide range of potential device applications from wave-based computing to electromagnetic wave emission and to quantum transduction. The mutually coupled dynamics of different quasi-particles is however challenging to simulate and predict using conventional micromagnetic or atomistic spin dynamics simulations which only address the magnon modes. In this presentation, the speaker will first introduce their in-house Multiphysics model (namely, dynamical phase-field model) that uniquely allows predicting the coupling strength, dissipation rates, and temporal evolution of coupled phonon, magnon, and photon modes using only fundamental materials parameters as the inputs. The speaker will then give an overview of the examples of applying this new predictive computational tool, in combination with analytical model, to simulate and design a wide range of hybrid magnonic systems with enhanced or new functionalities, harnessing resonant magnon-photon [1], magnon-spoof surface plasmon polariton (SSPP) [2], phonon-magnon-photon [3], magnon-phonon [4-8] coupling, and dual-channel magnon excitation by both magnon-magnon and magnon-photon coupling [9]. Examples that involve collaboration with experiments [1,2,8,9] will be highlighted. A brief outlook of the theoretical and computational modeling of hybrid magnonic system will then be presented.

The speaker gratefully acknowledges the contributions of all co-authors on the nine papers referenced in this abstract. The nine papers are listed in the Publications Reference session.