Abstract Sub wavelength all-dielectric structures processing simultaneously electric and magnetic resonances provide a new horizon for tailoring magnetic light–matter interaction that is often overlooked in optical spectrum. In general, the magnetic field enhancement can be boosted by utilizing the magnetic resonances of dielectric resonators where structural disorder effect is considered as a parasitic negative effect for the targeted response. Here, in contrast, we theoretically propose and experimentally demonstrate that compact disordered dielectric resonators with substantial enhancement of free-space magnetic field can be automatically designed by the combination of simulated annealing algorithm and numerical solution of Maxwell’s equations, providing an alternative for tailoring magnetic light–matter interaction. The functionality and reliability of the proposed concept are further verified by microwave experiment. Our results might facilitate the application of compact disordered magnetic resonators in enhancing magnetic dipole transition of quantum emitter, magnetic resonance imaging, wireless power transfer and beyond.

中文翻译：

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模拟退火算法设计的紧凑型无序磁谐振器

摘要 亚波长全介电结构同时处理电和磁共振，为定制光谱中经常被忽视的磁光-物质相互作用提供了新的视野。通常，可以通过利用介电谐振器的磁共振来增强磁场增强，其中结构无序效应被认为是目标响应的寄生负面效应。相比之下，我们从理论上提出并通过实验证明，可以通过模拟退火算法和麦克斯韦方程组的数值解的组合自动设计具有显着增强的自由空间磁场的紧凑无序介电谐振器，为定制磁光提供了一种替代方案。 ——物质互动。微波实验进一步验证了所提出概念的功能性和可靠性。我们的结果可能有助于紧凑无序磁共振器在增强量子发射器的磁偶极子跃迁、磁共振成像、无线电力传输等方面的应用。