Dissipative coupling induced UWB magnonic frequency combs generation

TL;DR

This paper theoretically demonstrates the generation of ultra-wideband magnonic frequency combs induced by dissipative coupling in an open cavity system, revealing broad, flat combs and chaotic regimes, advancing spin-wave science.

Contribution

It introduces a novel mechanism for UWB magnonic comb generation via dissipative coupling in open systems, expanding the understanding of nonlinear magnomechanical dynamics.

Findings

Broad magnonic comb with up to 400 lines

Frequency combs with gigahertz repetition rates

Chaotic behavior at increased coupling strength

Abstract

Magnonic frequency combs have recently attracted particular attention due to their potential impact on spin-wave science. Here, we demonstrate theoretically the generation of ultra-wideband (UWB) magnonic frequency combs induced by dissipative coupling in an open cavity magnomechanical system. A broadband comb with gigahertz repetition rates is obtained in the magnonic spectrum and a typical non-perturbation frequency-comb structure is also observed. The total width of the magnonic comb in the robust plateau region can be up to 400 comb lines, which is much broader and flatter than the reported in the previous works. Furthermore, when the dissipative coupling strength is further increased, the chaotic motion is predicted in the magnonic spectrum. Our results provide an in-depth understanding of nonlinear magnomechanic dynamics in open quantum systems and fundamentally broadens the research range of magnon in new spectral regimes.