Negative refraction of inhomogeneous waves in lossy isotropic media
Negative refraction of inhomogeneous waves in lossy isotropic media
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DOI：
10.1088/2040-8978/16/3/035103
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发表时间：
2013-05
影响因子：
2.1
通讯作者：
V. Fedorov;T. Nakajima
中科院分区：
文献类型：
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作者：
V. Fedorov;T. Nakajima
从理论上研究了各向同性有耗介质界面上非均匀波的负折射。我们得到了通过以复介电常数和磁导率为特征的两种有耗介质之间的界面传播的波的参数的显式（直到符号）表达式。我们证明了要求负介电常数和负磁导率的负折射判据只能用于在无损介质和有损介质之间的界面处均匀入射波的情况。在更一般的情况下，当入射波是非均匀的，或者两种介质都有损耗时，负折射的判据就依赖于入射角。最有趣的是，我们证明了负折射可以在传统的有耗材料（如金属）中实现，如果它们的界面取向适当。
We theoretically study negative refraction of inhomogeneous waves at the interface of lossy isotropic media. We obtain explicit (up to the sign) expressions for the parameters of a wave transmitted through the interface between two lossy media characterized by complex permittivity and permeability. We show that the criterion of negative refraction that requires negative permittivity and permeability can be used only in the case of a homogeneous incident wave at the interface between a lossless and lossy media. In a more general situation, when the incident wave is inhomogeneous, or both media are lossy, the criterion of negative refraction becomes dependent on an incidence angle. Most interestingly, we show that negative refraction can be realized in conventional lossy materials (such as metals) if their interfaces are properly oriented.