Controlling coupled magnons with pumps

doi:10.1088/1674-1056/addce3

Abstract Strong coupling effects in magnonic systems are highly promising. They combine the advantages of different quasiparticles and enable energy transfer for coherent information processing. When driven by microwave, electric, or optical pumps, these coupling effects can give rise to intriguing nonlinear phenomena, which have become a focal point in the field of magnonics. This review systematically explores pump-engineered magnon-coupling systems from three perspectives: (1) pump-induced hybridization of magnon modes, (2) nonlinear manipulation of magnon dynamics, and (3) implementation of functional magnonic devices. Unlike conventional cavity-magnon interactions that are constrained by electromagnetic boundaries, pumped coupled magnons are liberated from these restrictions. They can operate over a broad frequency band rather than being confined to discrete modes. An example is the recently discovered pump-induced magnon mode (PIM). These magnons arise from the collective excitations of unsaturated spins driven by microwave pumps. They exhibit reduced damping and photon-number-sensitive splitting characteristics, facilitating waveform-controlled coupling strength and enhanced nonlinearity - features that support phenomena such as magnonic frequency combs (MFCs). By expanding this principle to electric pumping schemes, we bridge fundamental physics and practical device applications, enabling nonreciprocal switching and meter-scale strong coupling. These advances establish high-dimensional control capabilities for coupled magnonics and pave the way for their use as a promising platform for dynamically programmable devices, magnetic-field sensing, and coherent networks.

Keywords: magnon strong coupling magnonic frequency comb spintronics

Received: 31 March 2025
Revised: 20 May 2025
Accepted manuscript online: 27 May 2025

PACS:	76.50.+g	(Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance)
	75.30.Ds	(Spin waves)
	85.70.Ge	(Ferrite and garnet devices)
	85.75.-d	(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)

Fund: This work has been supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB0580000), the National Natural Science Foundation of China (Grant Nos. 12204306, 12122413, 12227901, 12474120, and U23A6002), the Science and Technology Commission of Shanghai Municipality (Grant Nos. 23JC1404100 and 22JC1403300), the National Key R&D Program of China (Grant Nos. 2022YFA1404603 and 2023YFA1406604), the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2024YQ001), and the Qilu Young Scholar Programs of Shandong University.

Corresponding Authors: Jinwei Rao, Bimu Yao
E-mail: raojw@sdu.edu.cn;yaobimu@mail.sitp.ac.cn

Cite this article:

Fan Yang(杨帆), Chenxiao Wang(王辰笑), Zhijian Chen(陈志坚), Kaixin Zhao(赵恺欣), Weihao Liu(刘炜豪), Shuhuan Ma(马舒寰), Chunke Wei(魏纯可), Jiantao Song(宋剑涛), Jinwei Rao(饶金威), and Bimu Yao(姚碧霂) Controlling coupled magnons with pumps 2025 Chin. Phys. B 34 107508

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