On-Demand Magnon Resonance Isolation in Cavity Magnonics

TL;DR

This paper presents a method to on-demand isolate magnons in cavity magnonics using Floquet engineering and collective modes, enabling protected magnonic signals and scalable large-scale magnonic circuits.

Contribution

It introduces a novel approach combining collective modes and Floquet engineering for tunable magnon isolation in cavity magnonics.

Findings

Magnonic signals can be switched to a protected dark mode.

The method enables on-demand magnon isolation.

Scalability to large magnonic resonator arrays is demonstrated.

Abstract

Cavity magnonics is a promising field focusing the interaction between spin waves (magnons) and other types of signals. In cavity magnonics, the function of isolating magnons from the cavity to allow signal storage and processing fully in the magnonic domain is highly desired, but its realization is often hindered by the lack of necessary tunability on the interaction. This work shows that by utilizing the collective mode of two YIG spheres and adopting Floquet engineering, magnonic signals can be switched on-demand to a magnon dark mode that is protected from the environment, enabling a variety of manipulation over the magnon dynamics. Our demonstration can be scaled up to systems with an array of magnonic resonators, paving the way for large-scale programmable hybrid magnonic circuits.