Generation of Circulating Cavity Magnon Polaritons

Bourhill, Jeremy; Yu, Weichao; Vlaminck, Vincent; Bauer, G.; Ruoso, G.; Castel, Vincent

doi:10.1103/physrevapplied.19.014030

Cited by 16 publications

(1 citation statement)

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“…The strong coupling between the Kittel mode magnon (spatially uniform precession of magnetization) and the cavity photon was theoretically predicted by Soykal and Flatté 9,10 and experimentally observed in hybrid systems that involve a yttrium iron garnet (YIG) bulk crystal slab 11,12 , permalloy thin-film stripe 13 , YIG film 14 mounted on a coplanar microwave resonator, or YIG bulk crystal sphere(s)/slab inside a three-dimensional (3D) microwave cavity 4,[15][16][17][18][19] . One key feature of such strong coupling is the mode frequency splitting with an avoided crossing in the frequency spectrum, which indicates the hybridization of magnon and photon into a new quasiparticle called magnon polariton 14,18,20 . In the time-domain, the energy of magnon polaritons is constantly exchanged between the magnon and the photon system with 100% conversion efficiency.…”

Section: Introductionmentioning

confidence: 99%

Dynamical phase-field model of cavity electromagnonic systems

Hu,

Zhuang,

Zhong

et al. 2023

Preprint

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Cavity electromagnonic system, which simultaneously consists of cavities for microwave photons, magnons (quanta of spin waves), and acoustic phonons, provides an exciting platform to achieve coherent energy transduction among different physical systems down to single quantum level. Here we report a dynamical phase-field model that allows simulating the coupled dynamics of the electromagnetic waves, magnetization, and strain in 3D electromagnonic systems which have previously not been considered together. As examples of application, we computationally demonstrate the excitation of hybrid magnon-photon modes (magnon polaritons), Floquet-induced magnonic Aulter-Townes splitting, dynamical energy exchange (Rabi oscillation) and relative phase control (Ramsey interference) between the two magnon polariton modes. The simulation results are well consistent with analytical calculations based on Floquet Hamiltonian theory. With the capability to predict coupling strength, dissipation rates, and temporal evolution of photon/magnon/phonon mode profiles using only fundamental materials parameters as inputs, the present dynamical phase-field model represents a critically needed computational tool to guide and accelerate the fabrication of the cavity electromagnonic system and the design of operating conditions for applications in quantum sensing, transduction, and communication.

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