One of the main achievements of metamaterials research has been the development of structured matter exhibiting optical magnetism: first, in an array of microwave split-ring resonators and, soon after, in plasmonic and dielectric metamaterials at THz to visible frequencies. We show here that metamaterial structuring is not necessary to achieve optical magnetic response. Indeed, such a response is an essential characteristic of homogeneous dielectric thin films—Fabry–Pérot resonances, for example, depend on interference among electromagnetic multipoles including the magnetic dipole.

中文翻译：

---

无超材料的光磁响应

超材料研究的主要成就之一是开发了具有光学磁性的结构物质：首先，在一系列微波裂环谐振器中，不久之后，在太赫兹到可见频率的等离子体和介电超材料中。我们在这里表明，超材料结构不是实现光磁响应所必需的。事实上，这种响应是均质电介质薄膜的基本特征——例如，法布里-珀罗共振取决于包括磁偶极子在内的电磁多极子之间的干扰。