Creation of isotropic super-resolved magnetization with steerable orientation

In this work, we present a feasible pathway for initially constructing light-induced isotropic super-resolved magnetization along with steerable orientations and trivial side-lobe levels. Toward this end, the counter-propagating azimuthally polarized vortex Hermite-Gauss beams are tailored with angular rotators at the exit pupil planes and then focused by using high numerical aperture objective lenses in a 4π optical microscopic configuration. By wilfully regulating the rotatable azimuth angle and judiciously optimizing the scaling parameter, the spherical super-resolved (λ³/24), orientation-tunable (any direction), and sidelobe-negligible (<20%) magnetization spot can thus be produced. Such well-defined magnetization behavior is attributed to not merely the axially symmetrical destruction of the incoming vectorial fields but also the constructive interference in all directions caused by all the magnetization components. The demonstrated outcomes hold great potential in developing novel magneto-optical and spin-photonic devices.