Strong magnon-photon coupling with chip-integrated YIG in the zero-temperature limit

Abstract

The cross-integration of spin-wave and superconducting technologies is a promising method for creating novel hybrid devices for future information processing technologies to store, manipulate, or convert data in both classical and quantum regimes. Hybrid magnon-polariton systems have been widely studied using bulk Yttrium Iron Garnet (Y${}_3$Fe${}_5$O${}_{12}$, YIG) and three-dimensional microwave photon cavities. However, limitations in YIG growth have thus far prevented its incorporation into CMOS compatible technology such as high quality factor superconducting quantum technology. To overcome this impediment, we have used Plasma Focused Ion Beam (PFIB) technology -- taking advantage of precision placement down to the micron-scale -- to integrate YIG with superconducting microwave devices. Ferromagnetic resonance has been measured at millikelvin temperatures on PFIB-processed YIG samples using planar microwave circuits. Furthermore, we demonstrate strong coupling between superconducting resonator and YIG ferromagnetic resonance modes by maintaining reasonably low loss while reducing the system down to the micron scale. This achievement of strong coupling on-chip is a crucial step toward fabrication of functional hybrid quantum devices that advantage from spin-wave and superconducting components.

arXiv comment10 pages, 6 figures

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Cited by in corpus (9)

• Roadmap on Spin-Wave Computing
• Coherent coupling of two remote magnonic resonators mediated by superconducting circuits
• Propagating spin-wave spectroscopy in nanometer-thick YIG films at millikelvin temperatures
• Direct probing of strong magnon-photon coupling in a planar geometry
• A Distributed Magnetostatic Resonator
• High-performance magnetostatic wave resonators through deep anisotropic etching of GGG substrates
• Wavenumber-dependent magnetic losses in YIG-GGG heterostructures at millikelvin temperatures
• Frequency fluctuations of ferromagnetic resonances at milliKelvin temperatures
• Interaction of magnons with plasmons in a system of antiferromagnetic insulators coupled to a superconductor microwave cavity through the interfacial exchange interaction