A permalloy nanowire concentrates and suppresses GHz microwave fields in sub-300 nm regions, mapped via NV Rabi oscillations, with a directly measured ~2.35x field enhancement at 84 nm and an extrapolated 4x at the surface.
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Flux channeling induced nano-confinement and enhancement of microwaves imaged by Rabi oscillation mapping
A permalloy nanowire concentrates and suppresses GHz microwave fields in sub-300 nm regions, mapped via NV Rabi oscillations, with a directly measured ~2.35x field enhancement at 84 nm and an extrapolated 4x at the surface.