Strong magnon-photon coupling in on-chip CoFe/LiNbO3 hybrid nanostructures

doi:10.1088/1674-1056/ae2d3c

中国物理B ›› 2026, Vol. 35 ›› Issue (4): 47503-047503.doi: 10.1088/1674-1056/ae2d3c

Strong magnon-photon coupling in on-chip CoFe/LiNbO₃ hybrid nanostructures

Jinlong Wang(王锦龙)^1,2,†, Rundong Yuan(袁润东)^3,†, Manuel Mueller^4,5, Luis Flacke^4,5, Hanchen Wang(王涵晨)⁶, Kanglin Yu(俞康麟)^1,2, Junfeng Hu(胡俊峰)¹, Fenglin Zhong(钟丰麟)⁷, Jilei Chen(陈济雷)¹, Mathias Weiler⁸, Matthias Althammer^4,5,‡, and Haiming Yu(于海明)^1,2,§

1 International Quantum Academy, Shenzhen 518048, China;
2 Fert Beijing Institute, MIIT Key Laboratory of Spintronics, School of Integrated Circuit Science and Engineering, Beihang University, Beijing 100191, China;
3 TCM Group, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom;
4 Walther-Meibner-Institut, Bayerische Akademie der Wissenschaften, Garching 85748, Germany;
5 TUM School of Natural Sciences, Technical University of Munich, Garching 85748, Germany;
6 Department of Materials, ETH Zurich, Zurich 8093, Switzerland;
7 CDT in Superconductivity, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom;
8 Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Kaiserslautern 67663, Germany

收稿日期:2025-11-10 修回日期:2025-12-12 接受日期:2025-12-16 发布日期:2026-04-13
通讯作者: Matthias Althammer, Haiming Yu E-mail:matthias.althammer@wmi.badw.de;haiming.yu@buaa.edu.cn
基金资助:
This project was supported by the National Key Research and Development Program of China (Grant No. 2022YFA1402801), the National Natural Science Foundation of China (Grant Nos. 12525406, 12474104, 12074026, and 52225106), the China Scholarship Council (CSC) Scholarship (Grant Nos. 202408060249 and 202206020091), the Cambridge Commonwealth, European, and International Trust, the Shenzhen Science and Technology Program (Grant No. RCBS20231211090814026), and the EPSRC Centre for Doctoral Training in Superconductivity (Grant No. EP/Y035453/1).

Strong magnon-photon coupling in on-chip CoFe/LiNbO₃ hybrid nanostructures

1 International Quantum Academy, Shenzhen 518048, China;
2 Fert Beijing Institute, MIIT Key Laboratory of Spintronics, School of Integrated Circuit Science and Engineering, Beihang University, Beijing 100191, China;
3 TCM Group, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom;
4 Walther-Meibner-Institut, Bayerische Akademie der Wissenschaften, Garching 85748, Germany;
5 TUM School of Natural Sciences, Technical University of Munich, Garching 85748, Germany;
6 Department of Materials, ETH Zurich, Zurich 8093, Switzerland;
7 CDT in Superconductivity, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom;
8 Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Kaiserslautern 67663, Germany

Received:2025-11-10 Revised:2025-12-12 Accepted:2025-12-16 Published:2026-04-13
Contact: Matthias Althammer, Haiming Yu E-mail:matthias.althammer@wmi.badw.de;haiming.yu@buaa.edu.cn
Supported by:
This project was supported by the National Key Research and Development Program of China (Grant No. 2022YFA1402801), the National Natural Science Foundation of China (Grant Nos. 12525406, 12474104, 12074026, and 52225106), the China Scholarship Council (CSC) Scholarship (Grant Nos. 202408060249 and 202206020091), the Cambridge Commonwealth, European, and International Trust, the Shenzhen Science and Technology Program (Grant No. RCBS20231211090814026), and the EPSRC Centre for Doctoral Training in Superconductivity (Grant No. EP/Y035453/1).

1. 2026-047503-SI.pdf(1103KB)

摘要/Abstract

摘要： We demonstrate strong magnon-photon coupling using on-chip arrays of ferromagnetic CoFe nanowires fabricated on a dielectric lithium niobate substrate. A large coupling strength of 1.1 GHz and a cooperativity of 3.1 at a frequency of 24.5 GHz are achieved in CoFe nanowires with a volume of 110 μ³, facilitated by the enhanced spin-photon interaction at the single-spin level. The measured spectra are analyzed using a semiclassical theoretical model that combines the Landau-Lifshitz equation with Maxwell's equations. Our results provide an on-chip approach to integrated hybrid magnonics based on nanomagnets, offering promising routes for the development of coherent information-processing devices.

关键词: magnonics, magnon-photon coupling, nanomagnet, on-chip

Abstract: We demonstrate strong magnon-photon coupling using on-chip arrays of ferromagnetic CoFe nanowires fabricated on a dielectric lithium niobate substrate. A large coupling strength of 1.1 GHz and a cooperativity of 3.1 at a frequency of 24.5 GHz are achieved in CoFe nanowires with a volume of 110 μ³, facilitated by the enhanced spin-photon interaction at the single-spin level. The measured spectra are analyzed using a semiclassical theoretical model that combines the Landau-Lifshitz equation with Maxwell's equations. Our results provide an on-chip approach to integrated hybrid magnonics based on nanomagnets, offering promising routes for the development of coherent information-processing devices.

Key words: magnonics, magnon-photon coupling, nanomagnet, on-chip

中图分类号: (Magnetization dynamics)

75.78.-n

76.50.+g (Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance) 52.35.Mw (Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.)) 71.36.+c (Polaritons (including photon-phonon and photon-magnon interactions))

Jinlong Wang(王锦龙), Rundong Yuan(袁润东), Manuel Mueller, Luis Flacke, Hanchen Wang(王涵晨), Kanglin Yu(俞康麟), Junfeng Hu(胡俊峰), Fenglin Zhong(钟丰麟), Jilei Chen(陈济雷), Mathias Weiler, Matthias Althammer, and Haiming Yu(于海明). Strong magnon-photon coupling in on-chip CoFe/LiNbO₃ hybrid nanostructures[J]. 中国物理B, 2026, 35(4): 47503-047503.

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Strong magnon-photon coupling in on-chip CoFe/LiNbO₃ hybrid nanostructures

Strong magnon-photon coupling in on-chip CoFe/LiNbO₃ hybrid nanostructures

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