Continuously controllable dissipative and coherent couplings by the interaction between anti-resonance and multiple magnons

TL;DR

This paper demonstrates a system that can switch between dissipative and coherent magnon couplings using anti-resonance, enabling selective microwave signal transmission over a wide magnetic field range.

Contribution

It introduces a novel method to control magnon couplings continuously by exploiting the interaction between anti-resonance and multiple magnons.

Findings

We experimentally realize controllable dissipative and coherent magnon couplings.

We observe that magnetic field distribution influences the type of coupling.

The system enables selective microwave transmission across a broad magnetic field range.

Abstract

Weexperimentally realize the continuously controllable dissipative coupling and coherent coupling induced by different magnon modes and the same anti-resonance. It has been observed that the weaker the microwave magnetic field distribution of the magnon mode in magnetic materials, the more likely dissipative coupling is to occur. Conversely, stronger magnetic field distributions favor coherent coupling. Based on this principle, we have designed and implemented a system that alternates between dissipative and coherent coupling regimes. It allows microwave signals to be selectively transmitted over a large applied magnetic field range at the frequency of anti-resonance. Our experimental achievements may promote the construction of new magnonics devices like magnetic-tuning switch.