Control of the magnon-polariton hybridization with a microwave pump

TL;DR

This paper demonstrates the control of magnon-polariton hybridization in a cavity magnonic system using a microwave pump, enabling tunable spin dynamics and hybrid device manipulation beyond intrinsic material limits.

Contribution

It introduces a method to manipulate PIM-CMP hybridization via microwave pumping, combining two coherent coupling processes in a single cavity for enhanced control.

Findings

Hybrid system exhibits tunable properties via magnetic field, pump power, and frequency.

Coherent manipulations show behaviors beyond intrinsic material limitations.

Enables extended control of hybrid magnonic devices.

Abstract

Pump-induced magnon modes (PIMs) are recently discovered elementary excitations in ferrimagnets that offer significant tunability to spin dynamics. Here, we investigate the coupling between a PIM and cavity magnon polaritons (CMPs) by driving a cavity magnonic system away from equilibrium with a microwave pump. In our experiment, the Walker mode simultaneously couples with the PIM and cavity photons and thus combines two strongly coherent coupling processes in a single cavity structure. Such a PIM-CMP hybridization system acquires complementary properties from both the PIM and CMPs, allowing it to be freely manipulated by the magnetic field, the pump power and the pump frequency. These coherent manipulations exhibit unique behaviors beyond the intrinsic properties limited by the material nature and electromagnetic boundary conditions, thereby creating opportunities for extending the control of hybrid devices.