High‐Throughput Ideal Magnetic Multipoles Screening

Abstract

The concept of ideal magnetic multipole scattering (IMMS) describes light scattering by nonmagnetic nanoparticles governed purely by magnetic multipole modes, with electric contributions strongly suppressed. Achieving IMMS in core–shell nanostructures is challenging, requiring precise control of materials and geometry. Here, a high‐throughput computational screening of 72 core–shell combinations is presented, computing over 6700 Mie spectra per configuration. Through multipolar decomposition, 26 ideal magnetic dipole (IMDS) and 527 ideal magnetic quadrupole (IMQS) scattering cases spanning the UV to short‐wave IR are identified. Statistical trends show that IMQS is more accessible, with Ag‐based cores and high‐index dielectric shells (e.g., GaP, Ge) maximizing modal purity. These results establish general design rules for isolating pure magnetic resonances and demonstrate that experimentally relevant material systems can realize IMMS using established nanofabrication techniques. Beyond providing a comprehensive dataset, this framework offers a roadmap toward machine‐learning–assisted design of magnetic scatterers, enabling directional scattering, anapole states, and meta‐atom architectures for advanced photonic devices, metamaterials, and quantum technologies.