Frequency modulation on magnons in synthetic dimensions

TL;DR

This paper introduces the concept of synthetic frequency dimensions in magnonics, enabling novel control and phenomena in magnon-based systems through linear frequency modulation, verified by simulations.

Contribution

It proposes a new framework for magnon manipulation using synthetic frequency dimensions, expanding the design possibilities for magnonic devices.

Findings

Prediction of Bloch oscillations in magnonic rings

Verification of phenomena through micromagnetic simulations

Operation within the linear spin-wave regime

Abstract

Magnons are promising candidates for next-generation computing architectures, offering the ability to manipulate their amplitude and phase for information encoding. However, the frequency degree of freedom remains largely unexploited due to the complexity of nonlinear process. In this work, we introduce the concept of synthetic frequency dimension into magnonics, treating the eigenfrequency of inherent modes as an additional degree of freedom. This approach enables the effective description of the temporal evolution of a magnon state using an effective tight-binding model, analogous to a charged particle hopping in a modulated lattice. A magnonic ring resonator is investigated as an example, and several intriguing phenomena are predicted, including Bloch oscillations and a leverage effect during unidirectional frequency shifts, all of which are verified through micromagnetic simulations. Notably, our strategy operates in the linear spin-wave regime, excluding the involvement of multi-magnon scattering and high-power generation. This work expands the toolkit for designing magnonic devices based on frequency modulation and paves the way for a new paradigm called magnonics in synthetic dimensions.