基于铁磁介质的左手材料

Left-handed materials with ferromagnetic medium: A review

超材料是近十几年来国际研究的热点,其中介电常数和磁导率同时为负数的左手材料是最典型一类代表,具有反向波、负折射系数等反常物理特性。左手材料虽然物理本质是等效连续介质,但实际上都是各种人工金属结构,物理特性决定于结构参数而非组成材料的特性。直接利用功能材料的本征物理特性产生负电磁参数进而获得左手特性,可以大大丰富左手材料的物理特性,并且将其跳出超材料设计的范畴,是左手材料领域中的特色研究领域。其中,基于铁磁介质的左手材料近年来已有较多研究。本文对基于铁磁介质的左手材料的研究进展做一综述。

Metamaterials have been a hot issue in the international research community over the past decade, among which the left-handed material（LHM） is the most typical one that possesses simultaneously negative permittivity and permeability and has unique electromagnetic properties. Although the physical nature of the LHM is equivalent to the continuous medium, in fact LHM is made of artificial metal structure and the physical properties are determined by the parameters of the structure rather than the intrinsic property of the material.Utilizing directly the functional materials＇ intrinsic physical properties which can generate negative electromagnetic parameters so as to obtain the left- handed properties can greatly enrich the physical characteristics of the LHM and jump out of the scope of design of metamaterial, which is also the characteristic research field in the research field of the LHM. There have been many studies on LHM with ferromagnetic medium in recent years. In this article, we will review the progress of LHM with ferromagnetic medium.