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首页> 外文期刊>Microwave Magazine, IEEE >Transforming Electromagnetics Using Metamaterials
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Transforming Electromagnetics Using Metamaterials

机译：使用超材料改变电磁

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摘要

Electromagnetic metamaterials are artificially structured media with unusual electromagnetic properties that can be engineered from the radio-frequency (RF) and microwave range all the way up to optical frequencies. In its present form, the field of metamaterials is just over ten years old but has already attracted intense interest from many research groups around the globe. Suddenly, classical electromagnetism took on a fresh and exciting perspective, revealing that there are fascinating phenomena still waiting to be discovered and corresponding applications to be invented. In particular, all this excitement is associated with the notion of the macroscopic constitutive parameters, such as the permittivity and permeability. What would be possible if we were able to synthesize electromagnetic materials with arbitrarily valued constitutive parameters? The richness of this possibility becomes more evident when we recall that material parameters can be anisotropic (varying with direction) or spatially inhomogeneous (varying from point to point). Moreover, they can attain values previously not considered (i.e., negative or close to zero), and they can even mix together the electric and magnetic response of a material (chirality).
机译：电磁超材料是具有非凡电磁特性的人工结构化介质，可以从射频（RF）和微波范围一直到光频率进行设计。以目前的形式，超材料领域已经有十多年的历史了，但是已经引起了全球许多研究小组的浓厚兴趣。突然之间，古典电磁学以崭新而令人兴奋的视角出现，揭示出仍在等待发现令人着迷的现象，并发明相应的应用程序。特别是，所有这些兴奋都与宏观本构参数（例如介电常数和磁导率）有关。如果我们能够合成具有任意值的本构参数的电磁材料，那将有可能吗？当我们回想起材料参数可以是各向异性（随方向变化）或空间不均匀（随点变化）时，这种可能性的丰富性变得更加明显。此外，它们可以达到先前未考虑的值（即，负或接近零），并且甚至可以将材料的电和磁响应（手性）混合在一起。

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