双折射左手材料与完美透镜
Birefringent left-handed metamaterials and perfect lenses
摘要：
我们描述了双折射左手材料的性质，并介绍了双折射完美透镜的概念。我们证明，在一个鲜明的对比，传统的左手完美的镜头在$ε=μ=-1$，其中$ε$是介电常数和$μ$是磁导率，双折射左手透镜可以集中TE或TM偏振波或两者，允许TE和TM图像的空间分离。讨论了左手双折射透镜在亚波长尺度下的分束和近场诊断等方面的应用。
英文摘要：
We describe the properties of birefringent left-handed metamaterials and introduce the concept of a birefringent perfect lens. We demonstrate that, in a sharp contrast to the conventional left-handed perfect lens at $ε=μ=-1$, where $ε$ is the dielectric constant and $μ$ is the magnetic permeability, the birefringent left-handed lens can focus either TE or TM polarized waves or both of them, allowing a spatial separation of the TE and TM images. We discuss several applications of the birefringent left-handed lenses such as the beam splitting and near-field diagnostics at the sub-wavelength scale.
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