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Strong Photon-Magnon Coupling Using a Lithographically Defined Organic Ferrimagnet
Journal article   Open access   Peer reviewed

Strong Photon-Magnon Coupling Using a Lithographically Defined Organic Ferrimagnet

Qin Xu, Hil Fung Harry Cheung, Donley S Cormode, Tharnier O Puel, Srishti Pal, Huma Yusuf, Michael Chilcote, Michael E Flatté, Ezekiel Johnston-Halperin and Gregory D Fuchs
Advanced science, Vol.11(14), 2310032
04/2024
DOI: 10.1002/advs.202310032
PMCID: PMC11005739
PMID: 38279583
url
https://doi.org/10.1002/advs.202310032View
Published (Version of record) Open Access

Abstract

A cavity-magnonic system composed of a superconducting microwave resonator coupled to a magnon mode hosted by the organic-based ferrimagnet vanadium tetracyanoethylene (V[TCNE] ) is demonstrated. This work is motivated by the challenge of scalably integrating a low-damping magnetic system with planar superconducting circuits. V[TCNE] has ultra-low intrinsic damping, can be grown at low processing temperatures on arbitrary substrates, and can be patterned via electron beam lithography. The devices operate in the strong coupling regime, with a cooperativity exceeding 1000 for coupling between the Kittel mode and the resonator mode at T≈0.4 K, suitable for scalable quantum circuit integration. Higher-order magnon modes are also observed with much narrower linewidths than the Kittel mode. This work paves the way for high-cooperativity hybrid quantum devices in which magnonic circuits can be designed and fabricated as easily as electrical wires.
vanadium tetracyanoethylene cavity magnonics hybrid quantum system lithographically defined low damping organic ferrimagnet strong coupling non-uniform magnon modes

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