Ultrastrong magnon-magnon coupling and chiral spin-texture control in a dipolar 3D multilayered artificial spin-vortex ice

Abstract

Strongly-interacting nanomagnetic arrays are ideal systems for exploring reconfigurable magnonics. They provide huge microstate spaces and integrated solutions for storage and neuromorphic computing alongside GHz functionality. These systems may be broadly assessed by their range of reliably accessible states and the strength of magnon coupling phenomena and nonlinearities. Increasingly, nanomagnetic systems are expanding into three-dimensional architectures. This has enhanced the range of available magnetic microstates and functional behaviours, but engineering control over 3D states and dynamics remains challenging. Here, we introduce a 3D magnonic metamaterial composed from multilayered artificial spin ice nanoarrays. Comprising two magnetic layers separated by a non-magnetic spacer, each nanoisland may assume four macrospin or vortex states per magnetic layer. This creates a system with a rich $16^N$ microstate space and intense static and dynamic dipolar magnetic coupling. The system exhibits a broad range of emergent phenomena driven by the strong inter-layer dipolar interaction, including ultrastrong magnon-magnon coupling with normalised coupling rates of $\frac{\Delta \omega }{\gamma }=0.57$, GHz mode shifts in zero applied field and chirality-selective magneto-toroidal microstate programming and corresponding magnonic spectral control.

References in corpus (9)

• Artificial "spin ice" in a geometrically frustrated lattice of nanoscale ferromagnetic islands
• Spectral analysis of topological defects in an artificial spin-ice lattice
• Two-photon Lithography for 3D Magnetic Nanostructure Fabrication
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• Chirality control via double vortices in asymmetric Co dots
• Exploring the phases of 3D artificial spin ice: From Coulomb phase to magnetic monopole crystal
• Spin-wave dynamics and symmetry breaking in an artificial spin ice
• Controlling polarization of spintronic THz emitter by remanent magnetization texture
• Texture fluctuations and emergent dynamics in coupled nanomagnets

Cited by in corpus (6)

• Artificial Spin Ice: A Tutorial on Design and Control of Geometry, Microstate, Magnon Dynamics & Neuromorphic Computing
• Ferromagnetic resonance in 3D-tilted square artificial spin ices
• From Bound States to Quantum Spin Models: Chiral Coherent Dynamics in Topological Photonic Rings
• Magnon-Magnon Interaction Induced by Dynamic Coupling in a Hybrid Magnonic Crystal
• Frequency comb in a macroscopic mechano-magnetic artificial spin ice
• Unveiling Micrometer-Range Spin-Wave Transport in Artificial Spin Ice