Microwave metamaterials

• 来源期刊: 国家科学评论（英文版）
• 年，卷（期）: 2018,（2）
• 页码范围: 134-136
• 页数: 3页
• 语种: 英文
• DOI: 10.1093/nsr/nwx133

摘要

Metamaterials are artificial structures with tailored meta-atoms at subwavelength scales to control electromagnetic waves at will.Usually,metamaterials are described by effective medium parameters (e.g.index of refraction,permittivity and permeability) due to the subwavelength nature of meta-atoms.When the meta-atom is comparable to the wavelength,the effective medium description is sometimes still valid but the effective medium parameters become dependent on the wave vector,i.e.non-local.